Hello,
First time poster long time reader.
I have read 20 billion forums where people continually say that "everything charges a touchpad" and "nothing charges a touchpad but original charger"
we are 5 years after launch and crash. Judging by forum activity people still have and use their touchpads.
what charges a HP touchpad? Do you need a special cable? Do you need a special charger? can some one after all this time give the definitive answer?
I have read through many posts on this forum and multiple others and it seems this question has not be clearly answered.
im looking for a "only a hp charger" or "500v and 90a will do it" or "connect nipples to car battery and furiously tongue the charging port".
to understand why I am asking this question. I dont have my original charger and i dont want to pay $40 for an american charger ( I dont live in America) I use a 5v 2.1a phone charger and it gives me the "to reliably charge" screen.
YesApples said:
Hello,
First time poster long time reader.
I have read 20 billion forums where people continually say that "everything charges a touchpad" and "nothing charges a touchpad but original charger"
we are 5 years after launch and crash. Judging by forum activity people still have and use their touchpads.
what charges a HP touchpad? Do you need a special cable? Do you need a special charger? can some one after all this time give the definitive answer?
I have read through many posts on this forum and multiple others and it seems this question has not be clearly answered.
im looking for a "only a hp charger" or "500v and 90a will do it" or "connect nipples to car battery and furiously tongue the charging port".
to understand why I am asking this question. I dont have my original charger and i dont want to pay $40 for an american charger ( I dont live in America) I use a 5v 2.1a phone charger and it gives me the "to reliably charge" screen.
Click to expand...
Click to collapse
Some are more picky than others, but I charge mine with any 5v, 2a charger. Time to fully charge varies, and if you use it while charging, it will not store much in the battery. Put it to sleep and let it charge until full.
So its more picky,
I am currently using a Belkin wallcharger that outputs 12w 2.4A. I have left my tablet plugged in and off for the last 24 hours and it wont turn on other then to tell me that to reliably charge I need the original charger. I have KK 4.4.4. Is this a typical charge time for these in other users experiances? how do we get it to charge with out an original cable or wallcharger?
I too would like to get to the bottom of this. I use the original charger and cable and from a dead battery takes a goot 15hrs before it boots up. The only indication its charging is the home button LED that flashed back and forth. I've tried 3rd party chargers and none work. I've tried 3rd party cables and none work.
theraque said:
I too would like to get to the bottom of this. I use the original charger and cable and from a dead battery takes a goot 15hrs before it boots up. The only indication its charging is the home button LED that flashed back and forth. I've tried 3rd party chargers and none work. I've tried 3rd party cables and none work.
Click to expand...
Click to collapse
It is a well-known fact that allowing the battery to fully discharge is problematic at best, disastrous at worst. None of the chargers are reliable when this occurs. The simple answer is don't let the battery go below about 10% before recharging, or you may not recover your tablet without having to debrick it.
This has been my experience:
Any old charger and cable will charge a Touchpad so long as the battery isn't completely dead. If the battery is completely dead, then there is a way to get enough power to turn it on without needing the original charger or cable. You simply plug it into the USB port of any computer and let it sit. Let it sit for a long time. I let mine sit for a day before trying to power it back on.
YMMV, but I've had success with that method.
YesApples said:
Hello,
First time poster long time reader.
I have read 20 billion forums where people continually say that "everything charges a touchpad" and "nothing charges a touchpad but original charger"
we are 5 years after launch and crash. Judging by forum activity people still have and use their touchpads.
what charges a HP touchpad? Do you need a special cable? Do you need a special charger? can some one after all this time give the definitive answer?
I have read through many posts on this forum and multiple others and it seems this question has not be clearly answered.
im looking for a "only a hp charger" or "500v and 90a will do it" or "connect nipples to car battery and furiously tongue the charging port".
to understand why I am asking this question. I dont have my original charger and i dont want to pay $40 for an american charger ( I dont live in America) I use a 5v 2.1a phone charger and it gives me the "to reliably charge" screen.
Click to expand...
Click to collapse
You are right about the many discussions about what chargers work with the TouchPad and which ones don't. I have sat in on many of them as well as done some testing of my own. The rule of thumb is it is best to use the official HP TouchPad charger. HP for some reason made the charging circuits proprietary on the TouchPad so that if you use a third party charger rated the same as the official one, it will charge but only at the lowest rate of 500mA. You can also charge the TP from a PC usb port, but again it is rated at 500mA. The catch is the TP uses more than 500mA when awake, so to use one of these methods, the TP has to be put to sleep or be turned off and will charge very slowly. That being said, you may find a third party charger that will charge the TP at the higher rate, but they are rare. At one time I was aware of a user who was modifying USB cords so that you could use a third party charger. He used to have a thread on RootzWiki forum, but that that forum was pretty much destroyed by spammers and his thread was lost. He had instructions with pictures and parts lists. Also, keep in mind, any good USB cable will work with the original HP charger. It's the modification that he was making to the cable that tricked the TP into thinking it is connected to a real HP charger.
However, I did find this post from a fellow that knows the mod one needs to make to get a third party charger to work with a TP:
https://forum.xda-developers.com/showpost.php?p=22990010&postcount=16
NT
PS. Here is a link to the entire thread if you want to read the whole thing, 4 pages: https://forum.xda-developers.com/showthread.php?t=1475537
nevertells2 said:
You are right about the many discussions about what chargers work with the TouchPad and which ones don't. I have sat in on many of them as well as done some testing of my own. The rule of thumb is it is best to use the official HP TouchPad charger. HP for some reason made the charging circuits proprietary on the TouchPad so that if you use a third party charger rated the same as the official one, it will charge but only at the lowest rate of 500mA. You can also charge the TP from a PC usb port, but again it is rated at 500mA. The catch is the TP uses more than 500mA when awake, so to use one of these methods, the TP has to be put to sleep or be turned off and will charge very slowly. That being said, you may find a third party charger that will charge the TP at the higher rate, but they are rare. At one time I was aware of a user who was modifying USB cords so that you could use a third party charger. He used to have a thread on RootzWiki forum, but that that forum was pretty much destroyed by spammers and his thread was lost. He had instructions with pictures and parts lists. Also, keep in mind, any good USB cable will work with the original HP charger. It's the modification that he was making to the cable that tricked the TP into thinking it is connected to a real HP charger.
However, I did find this post from a fellow that knows the mod one needs to make to get a third party charger to work with a TP:
https://forum.xda-developers.com/showpost.php?p=22990010&postcount=16
NT
PS. Here is a link to the entire thread if you want to read the whole thing, 4 pages: https://forum.xda-developers.com/showthread.php?t=1475537
Click to expand...
Click to collapse
I have confirmed all that you have said and now know this to be the definitive answer, since OP I have purchased 12 chargers advertising different automatic charge regulation features such as belkin "smart" chargers, none would charge over 500ma which of course as we now know is not sufficient to use the TP and takes days to charge, not what i would call functional.
I made a messy hack job charger.. im definitively not great at that and between an accident prone wife and 2 small children, my end result wasnt good enough to let charge alone next to the couch or something.
Finally, while i did all this I had a HP charger on order with an American wall plug ( i live in western Australia so different plug and long postage time) this charger works as expected and in my research was the only functional way to charge the TP
THANKS TEAM. we got there in the end.
YesApples said:
I have confirmed all that you have said and now know this to be the definitive answer, since OP I have purchased 12 chargers advertising different automatic charge regulation features such as belkin "smart" chargers, none would charge over 500ma which of course as we now know is not sufficient to use the TP and takes days to charge, not what i would call functional.
I made a messy hack job charger.. im definitively not great at that and between an accident prone wife and 2 small children, my end result wasnt good enough to let charge alone next to the couch or something.
Finally, while i did all this I had a HP charger on order with an American wall plug ( i live in western Australia so different plug and long postage time) this charger works as expected and in my research was the only functional way to charge the TP
THANKS TEAM. we got there in the end.
Click to expand...
Click to collapse
12 chargers! Holy Cow!!!! :laugh: I do remember that the guy who was building these cables purchased a USB connector and used surface mount resistors what he could fit inside the metal shell of the connector.
NT
Definitive answer... maybe...? 5.3+ volts and 2.0+ amps...?
YesApples said:
can some one after all this time give the definitive answer?
Click to expand...
Click to collapse
In seeking the same answer as you I seem to have stumbled upon a couple options that explain the answer...
Here I wanted to post a "Screenshot of HP forum answer regarding HP Tablet charger reqs" but the forum bots won't allow it...
So the screenshot the i wanted to include above will not post properly, i'll explain... the screenshot showed a h30434.www3.hp com/t5/Tablets-and-Mobile-Devices-Archive-Read-Only/Need-a-charger-for-my-HP-10-2101-Tablet/td-p/5962461" post on the HP support forum of someone asking basically the same question... specifically about the HP 10 2101 Tablet... forum user "Wyrenut" (has over 16,000 posts on the HP support forum) states confidently;
You can find one at pretty much any computer/electronics store, or online at amazon comIt just needs to be rated for a tablet - providing at least 2.0 amps of DC current and at least 5.3 volts, and a micro-USB port on the tablet end."
This seems to check out thus far in this quest for tablet power because I was able to find in my adapter bin a 5.1 volts DC @ 2.4 amp charger with a micro-USB end and after hours of being plugged in, and that has failed to charge an HP TouchPad 32GB I recently acquired without a charger. So I am currently seeking an adapter that will satisfy "Wyrenut's" stated requirements for an HP Tablet charger and once I get my hands on one, we will have the definitive answer and I will followup on this thread as well.
Useful infos to include in the definitive answer...?
www makeuseof com/tag/hp-touchpad-probably-not-bricked/" HP TouchPad Not Charging? Don’t Worry, It’s Probably Not Bricked!
HUGE thead...
forums.webosnation com/hp-touchpad/311591-hp-touchpad-won-t-turn-charge-5.html" HP TouchPad won't turn on or charge
Along discussion regarding TouchPad charging problems though I don't think it resolves anything.. it's lot of opine... a lot...
forums.webosnation com/hp-touchpad/311491-how-i-revived-my-dead-touchpad-6.html"How I revived my dead TouchPad
and another...
forums.webosnation com/hp-touchpad/296106-touchpad-won-t-charge.html" Touchpad won't charge?
I'll try to remember to follow up on this when I finally find a charger that is 5.3+ volts and 2.0+ amps to report my findings...
Good luck...
You Must Be of my Ilk!
I like posting to moldy old Touchpad Threads too!
Would love to see what you find out if they actually go to 2 AMPS although I have 8 actual TP chargers and 6 docks.....the chargers have been known to fail after a time.
Lip Lip Lip
[email protected] said:
You Must Be of my Ilk!
I like posting to moldy old Touchpad Threads too!
Would love to see what you find out if they actually go to 2 AMPS although I have 8 actual TP chargers and 6 docks.....the chargers have been known to fail after a time.
Lip Lip Lip
Click to expand...
Click to collapse
Do you know where I could obtain a TouchPad original charger? What charger exactly am I looking for? (I have never seen a real TP charger IRL)
Maybe you have some tips for what keywords I should search for on eBay?
Sanras said:
Do you know where I could obtain a TouchPad original charger? What charger exactly am I looking for? (I have never seen a real TP charger IRL)
Maybe you have some tips for what keywords I should search for on eBay?
Click to expand...
Click to collapse
https://www.amazon.com/North-Americ...prefix=hp+touchpad+usb+charger,aps,136&sr=8-3
Wireless charger:
https://www.ebay.com/itm/154667142566?epid=1234774932&hash=item2402e14da6:g:yzsAAOSw64Jhb6y5
https://www.ebay.com/itm/304026565204?epid=1234774932&hash=item46c9653a54:g:FiYAAOSwP4RgwFqE
https://www.ebay.com/itm/194688668828?epid=1234774932&hash=item2d5459549c:g:cR0AAOSwv2phhf6x
HP_TOUCHPAD said:
https://www.amazon.com/North-American-Power-Charger-TouchPad/dp/B0055QYJJM/ref=sr_1_3?crid=48DGI4WUGP7Z&keywords=hp+touchpad+usb+charger&qid=1641357732&sprefix=hp+touchpad+usb+charger,aps,136&sr=8-3
Wireless charger:
https://www.ebay.com/itm/154667142566?epid=1234774932&hash=item2402e14da6:g:yzsAAOSw64Jhb6y5
https://www.ebay.com/itm/304026565204?epid=1234774932&hash=item46c9653a54:g:FiYAAOSwP4RgwFqE
https://www.ebay.com/itm/194688668828?epid=1234774932&hash=item2d5459549c:g:cR0AAOSwv2phhf6x
Click to expand...
Click to collapse
Yeah, I found the Touchstone charger as well. I think that's probably the best choice, because not only is it pretty cheap and gets me a stand, but it also comes with the original barrel charger required for the proprietary HP charging circuit to use the full 2 Amps. (So I assume I could then use that barrel charger with a micro usb cable as a wired charger if I didn't want to use the wireless stand)
Still, I'm impressed a 2011 device has wireless charging. If I do buy that Touchstone, I'll probably just use the wireless charging for convenience.
Anyway, I first need to get this thing to boot. I have the (seemingly) common dead battery issue. I received this tablet from a friend for free, he said it was barely ever used and then put away in storage. The tablet is in like-new condition, so I believe him on that.
I've plugged it into a 5V 2A (10W) USB charger from a Moto G Pure, and it's currently alternating between two lights on the home button. (And has been doing so for the last 8 hours or so). I'll leave it overnight as well.
At that point, I assume I should start trying power vol and home button combos to try to turn it on? Do you have any suggestions on what I should do to get this tablet to boot?
Once I can get it to turn on, I'll probably look into getting the original charger (that Touchstone). Until it works though, I don't really want to invest $12 to $16 into this thing and then be left with a useless wireless charging stand.
I assume using a non original charger for now shouldn't be much of a problem apart from the charging being slow. It'll still charge, after all, even if at 500mA.
Sanras said:
Yeah, I found the Touchstone charger as well. I think that's probably the best choice, because not only is it pretty cheap and gets me a stand, but it also comes with the original barrel charger required for the proprietary HP charging circuit to use the full 2 Amps. (So I assume I could then use that barrel charger with a micro usb cable as a wired charger if I didn't want to use the wireless stand)
Click to expand...
Click to collapse
Yes the barrel charger from the wireless charger (Touchstone) can be use with any other USB cable and be use that way.
Sanras said:
Still, I'm impressed a 2011 device has wireless charging. If I do buy that Touchstone, I'll probably just use the wireless charging for convenience.
Click to expand...
Click to collapse
The HP Touchpad in 2011 had features not even available in devices at this moment in 2022.
Sanras said:
Anyway, I first need to get this thing to boot. I have the (seemingly) common dead battery issue. I received this tablet from a friend for free, he said it was barely ever used and then put away in storage. The tablet is in like-new condition, so I believe him on that.
I've plugged it into a 5V 2A (10W) USB charger from a Moto G Pure, and it's currently alternating between two lights on the home button. (And has been doing so for the last 8 hours or so). I'll leave it overnight as well.
Click to expand...
Click to collapse
Any charger providing exactly an output of 5.3 volts 2.0 amps will work, it does not need to be the original HP charger but with the same specs.
Sanras said:
At that point, I assume I should start trying power vol and home button combos to try to turn it on? Do you have any suggestions on what I should do to get this tablet to boot?
Click to expand...
Click to collapse
There is no special trick, just charge it in a warm room temperature above 80F with the right charger. Lithium batteries does not charge well in cold.
Sanras said:
Once I can get it to turn on, I'll probably look into getting the original charger (that Touchstone). Until it works though, I don't really want to invest $12 to $16 into this thing and then be left with a useless wireless charging stand.
I assume using a non original charger for now shouldn't be much of a problem apart from the charging being slow. It'll still charge, after all, even if at 500mA.
Click to expand...
Click to collapse
After it boots and is 100% charge the Tablet can be charge with any charger, but always keep it plug in ( charging ), never let it discharge.
HP_TOUCHPAD said:
Yes the barrel charger from the wireless charger (Touchstone) can be use with any other USB cable and be use that way.
The HP Touchpad in 2011 had features not even available in devices at this moment in 2022.
Any charger providing exactly an output of 5.3 volts 2.0 amps will work, it does not need to be the original HP charger but with the same specs.
There is no special trick, just charge it in a warm room temperature above 80F with the right charger. Lithium batteries does not charge well in cold.
After it boots and is 100% charge the Tablet can be charge with any charger, but always keep it plug in ( charging ), never let it discharge.
Click to expand...
Click to collapse
Ok, well, I don't have anything at 5.3 exactly, only 5.0V. I guess I'll go and buy a touchstone charger so I get the stand and barrel charger, so that it has the correct output. I really didn't think 0.3V would make much of a difference though.
Anyway, once I plug it into the original charger, how do I know when it is ready to turn on? Will it just turn on by itself, show a charging icon, or something else?
Sanras said:
Ok, well, I don't have anything at 5.3 exactly, only 5.0V. I guess I'll go and buy a touchstone charger so I get the stand and barrel charger, so that it has the correct output. I really didn't think 0.3V would make much of a difference though.
Anyway, once I plug it into the original charger, how do I know when it is ready to turn on? Will it just turn on by itself, show a charging icon, or something else?
Click to expand...
Click to collapse
It could probably work, give it a try.
1. LED light blink from side to side. ( The tablet's battery is depleted, but taking charge ( awake ). Leave it until it boots, it could take a week.
2. Second stage ( a battery sign with a red line under it ) will show on the screen.
3. It will boot.
Look at this guide for the info.
https://forum.xda-developers.com/t/hp-touchpad-novacom-repair-android.3960435/
HP_TOUCHPAD said:
It could probably work, give it a try.
1. LED light blink from side to side. ( The tablet's battery is depleted, but taking charge ( awake ). Leave it until it boots, it could take a week.
2. Second stage ( a battery sign with a red line under it ) will show on the screen.
3. It will boot.
Look at this guide for the info.
https://forum.xda-developers.com/t/hp-touchpad-novacom-repair-android.3960435/
Click to expand...
Click to collapse
Alright. Mine is blinking left/right, so I'll leave it until I see anything on the screen. (I shouldn't need to touch any buttons, right?)
HP_TOUCHPAD said:
It could probably work, give it a try.
1. LED light blink from side to side. ( The tablet's battery is depleted, but taking charge ( awake ). Leave it until it boots, it could take a week.
2. Second stage ( a battery sign with a red line under it ) will show on the screen.
3. It will boot.
Look at this guide for the info.
https://forum.xda-developers.com/t/hp-touchpad-novacom-repair-android.3960435/
Click to expand...
Click to collapse
Welp, I just bought a TouchStone. The eBay seller was surprisingly fast at replying to my offer, so now I have an in-box TouchStone charger arriving in a week for $13 and free shipping . Not bad.
Sanras said:
Welp, I just bought a TouchStone. The eBay seller was surprisingly fast at replying to my offer, so now I have an in-box TouchStone charger arriving in a week for $13 and free shipping . Not bad.
Click to expand...
Click to collapse
Great !
The TouchStone for some reason charge faster and better that USB.
Always keep the Tablet charging, never let the battery drain.
Have FUN!
Related
I went from an OG droid to the revolution. The car charger i used to use for the moto droid was charging that phone very fast, just like the ac charger. Now with the revo, it's pretty damn slow. I tried shorting the data pins with some solder and the revo actually dropped about 200mv worth of charging current. Strange. I thought shorting the data lines together put the phone into fast charge but when i "cat /proc/kmsg" it says "charging at 0mv" even though it is actually charging at about 400mv as verified by a ammeter. My home charger gets "charging at 1800mv". Some strange stuff. I'm gonna try the ipod method of 2.8/2.0 unless someone else can chime in here. Thanx
I'd be interested in this also. I'm using New Trent USB battery pack and I want it to be acknowledged by the Power Manager as a fast charge source -- not the "computer connected USB" source it shows as now.
I use a store bought adapter, with the verizon/LG cord I got with the phone, and if I use Google Maps and Navigator, I lose power while I am plugged in. Glad to see I am not the only one with the "issue"
I figure its just the way the phone charges, not anything to do with any bugs or what not, so I never really worried about it. I just make sure I am fully charged before I need to use the power sucking apps.
markapowell said:
I use a store bought adapter, with the verizon/LG cord I got with the phone, and if I use Google Maps and Navigator, I lose power while I am plugged in. Glad to see I am not the only one with the "issue"
I figure its just the way the phone charges, not anything to do with any bugs or what not, so I never really worried about it. I just make sure I am fully charged before I need to use the power sucking apps.
Click to expand...
Click to collapse
On USB "computer powered" I've found maps and weather apps suck battery much faster than it can recharge. I noticed that the car adapter is detected as "AC Powered" -- even though it's starting off as 12VDC. I was hoping to use the external USB battery pack to keep the internal battery full while using the maps and weather in our boat --- but after 5 hours with screen on and battery pack attached at "USB Computer" recharge rates, the internal battery was flat-out DEAD, and the external pack was only down about 35%.
We just need to figure out what the data lines want to see for a "dedicated charger" type-2 charge connection which will yield the full 1800mv like the ac charger does. I'm working on this...hope i don't fry my phone's usb controller
My problem is, i don't have a charger that shows up as such. My friend's last night did, i may try to get that from him and sniff the connection for resistance values etc.
Hey...I'll leave that level of wizardry to you! Good to know there is a possible answer.
Sent from my Revolting VS910 4G using XDA Premium App
I too would be very interested....thanks for the post
High Speed Charging
Dear All:
I do alternate energy research and we deal with Li battery packs all the time and have seen fires from improper charging. It is okay to advise rom and other software mods but when dealing with electricity it is possibly life threatening. We do not want to read in the next days post about a member dying in his sleep due to a fire. Please use utmost care when you post soldering and wireshorting hacks. We do not know the technical level of the person on the other end.
Second-most, the quality of third party chargers is very shoddy and they do not follow IEC or UL codes which adds another danger factor.
For example I bought a Chinese made Lamptron inverter for my cathode lights and the input wiring was wrong could have fried my gaming rig if I didn't check.
I understand your convern but 1800mA is the charge rate of the wall (ac) charger. That's what we're trying to achieve with a car charger. If you buy crap you're asking for problems. Most car chargers can output 2 full amps @5v but are setup to only charge at 500mA. USB charging of smart devices utilizes the data+ and data- lines as charge mode indicators. Small changes in resistance (therefore voltage) changes how the phone will pull amperage. I think everyone knows the danger of overheating lithium-ion batteries. We're not trying to do anything more than what the wall chargers already do. Check out xda a bit more and you'll see lots of posts about this very subject for different phones. Like this one. Or check out Ladyada's ipod charging research for some other good info. FYI, a good source of CCFL inverter parts is in old broken lcd tvs. Cheap, easy and reliable.
Now that that's out of the way, i set up a breadboard today so i can check some things out but had no time to test so hopefully tomorrow i can give some insight as to what the revo wants data line wise so it goes into "type 2" 1800mA charge mode. Will post with what i find and maybe some pics.
Alright. I just dug in for an hour and found out some things. My wall charger supplies 3.68vdc on both the data+ and data- lines. While using this charger the phone (using /pro/kmsg) goes into "type=2" charging mode with 1800mA. So. I hooked up my car charger. I noticed 2.1vdc on only one data line. So i made a quick resistive divider up to bring both data lines up to 3.68. BAM...didn't work. I also tried shorting the two data lines together while at 3.68v....nope. Then i threw a potentiometer in between the two data lines and tried a few values up to 200ohms....nope. I then pulled all connections to the car chargers data lines and supplied a fresh 3.68v to the output cable...nope. Last thing i did was just use my power supply to supply the 5v and gnd without the car charger in the loop....still couldn't get a type 2 charge. I'm losing my mind here. I think i missed something stupid or am over thinking this. I might start from scratch later but first, i need a few cigarettes. I'm hoping someone can chime in with a simple fix and call me stupid
I found another charger i had bought from radio shack a while ago. It's a PointMobl charger. Plugged it in and got an 1800mA type=2 charge. Sweet. Now i'm gonna dig into it and see why it works....plus i'm ditching the damn spiral cord cuz they piss me off.
I'm using the wall charger from a Moto Razr, and it puts the Revo into fast charge. I found the pinouts here: http://pinouts.ru/all/razrv3_charger_pinout.shtml
Any new insight from that?
[I'm Revolting -- are you? Beamed directly into your brain by Revolt 1.3]
Danzdroid said:
I'm using the wall charger from a Moto Razr, and it puts the Revo into fast charge. I found the pinouts here: http://pinouts.ru/all/razrv3_charger_pinout.shtml
Any new insight from that?
[I'm Revolting -- are you? Beamed directly into your brain by Revolt 1.3]
Click to expand...
Click to collapse
Some phones are like that. Common usb is 4 wire, micro usb adds another pin. That pin needs to get a 200ohm resistor jumped to the shorted d+/- lines. The thing is, the wall charger only has 4 pins like every other usb. Unless the cable itself has the extra pin connected to the data lines through a resistor, it still doesn't explain the difference. I haven't taken this other charger apart yet, actually, i don't think i can without destroying it as it looks to be sonic-welded at the seams. What happened to the old screw-ended cig lighter adapters??
deftonesmw said:
Some phones are like that. Common usb is 4 wire, micro usb adds another pin. That pin needs to get a 200ohm resistor jumped to the shorted d+/- lines. The thing is, the wall charger only has 4 pins like every other usb. Unless the cable itself has the extra pin connected to the data lines through a resistor, it still doesn't explain the difference. I haven't taken this other charger apart yet, actually, i don't think i can without destroying it as it looks to be sonic-welded at the seams. What happened to the old screw-ended cig lighter adapters??
Click to expand...
Click to collapse
Probably one too many people opening them and electrocuting themselves. Or glue is cheaper than metal screws.
Sent from the awesomsness, that is my phone. Rev, Revolt 1.0, swype, go launcher.
deftonesmw,
I wanted to say I'm looking forward to your findings. In the meantime, I ended up buying a car charger that claims high ma charging. It sounds like Danzdroid has issues with his battery pack charger which could possibly benefit from your research too.
Wall charger: 100 to 120 AC converted to low voltage dc
Car: 12v DC no conversion, probably resistance regulated.
Stating the obvious the wall charger is a complete different beast from the low voltage computer/car charger. With out a 12v dc to ac converter I don't think you will ever get a car to charge like a wall charger.
Your radio shack device probably uses some type of capacitor device to ramp up the juice then runs it through some sort of regulator which simulates the AC style charge.
Or at least if I was designing one that is how I would do it.
Haxcid said:
Wall charger: 100 to 120 AC converted to low voltage dc
Car: 12v DC no conversion, probably resistance regulated.
Stating the obvious the wall charger is a complete different beast from the low voltage computer/car charger. With out a 12v dc to ac converter I don't think you will ever get a car to charge like a wall charger.
Your radio shack device probably uses some type of capacitor device to ramp up the juice then runs it through some sort of regulator which simulates the AC style charge.
Or at least if I was designing one that is how I would do it.
Click to expand...
Click to collapse
My car charges like a wall charger. It's not about inverting alternating to direct. It's about getting the phone to pull the amperage. Regardless of what the max current is, the phone has modes of charging. It will pull what it's directed to pull depending on the charge mode it's put into by either d- and d+ voltages and/or resistance across certain conductors. Most car chargers can produce a full 2 amps, that's not saying they are actually doing that though. It all depends on what the phone is taking, not what the charger is giving. You're looking at this the wrong way. 90% of chargers are capable of the output (dc car chargers), it's the phone that desides what to pull according to the chargers instruction (data lines and/or 5th micro pin). The charger's maximum output is equal to the fuseable value it contains. So. Yes, my car charger charges the same as my wall charger. By the way, capacitors by themselves store energy, they don't "ramp" anything. The only caps in my car charger are for smoothing as far as i can see. It's all about resistance, not capacitance. A wall charger is just a car charger with an inverter before it in the sequence. In fact, you could open a wall charger up and split the two circuits, apply 12v to the dc half's input traces and get the same effect....without the ac components even in the same room.
20 buck solution.
Buy inverter.
plug in AV charger.
Enjoy AC charging in your car.
I'm working on a real solution to this but for now an inverter is a good workaround
"Home-Less and happy"
K0G said:
20 buck solution.
Buy inverter.
plug in AV charger.
Enjoy AC charging in your car.
I'm working on a real solution to this but for now an inverter is a good workaround
"Home-Less and happy"
Click to expand...
Click to collapse
lol...i was doing the same thing for a while
deftonesmw said:
I found another charger i had bought from radio shack a while ago. It's a PointMobl charger. Plugged it in and got an 1800mA type=2 charge. Sweet. Now i'm gonna dig into it and see why it works....plus i'm ditching the damn spiral cord cuz they piss me off.
Click to expand...
Click to collapse
I went to Radio Shack today and got one of these. It shows up just like the ac charger does. I will be able to use it in my car dock for navigation and not have to worry about the running the battery down. At least that is what I am hoping for.
I'm about to use a Moto Milestone 1 charger for OB but I'm afraid that it may harm the phone. Both phones are listed with MicroUSB 2. Any tips?
thanks
Don't worry.. it will work Ok, but OB charger has 1000ma, if you use another charger that has let's say 500ma (like USB) it will take 3 hours to charge the phone instead of the regular 45 minutes!
I use a samsung cable directly from USB, the car USB port, a samsung 5530 charger, a LG optimus one charger, and they all worked, with various degrees of effectiveness!
The most useful one is the car's USB port that, even if it cannot keep up with the GPS (it charges slower than the battery drains), it can keep the phone running with 10% loss every hour with screen activated and GPS at the same time! The problem is that I hate radio and don't use CD's that much, and usually end up with the phone depleted before I reach the destination!
Thanks man! Ok I'll check that "ma" thing. BTW is it written on the battery or charger?
BoyBawang2 said:
Thanks man! Ok I'll check that "ma" thing. BTW is it written on the battery or charger?
Click to expand...
Click to collapse
Both places; battery specify working and standby V and mA, charger specify the V and mA provider
So you can use almost every different charger if the specs are the same, but be aware of this: don't use a charger with less mA since it can burn the charger
Ma - miliamps.
How many milliamps in 1 watt/volt? The answer is 1000.
I assume you are converting between milliampere and watt/volt.
I never had a burnt charger by the way, that would be very strange considering that the phone is accepting 500ma from the start (that is the USB output on any PC), and I even saw chargers with a power of 2W (SUPER FAST CHARGERS). The Motorola chargers are 850 ma usually, so it should work quite good!
Indeed, it's very strange to have a burnt charger and we don't need to go into an electrical discussion but that happens because of 2 possible things, very high-peak of voltage or prolonged use of under-voltage
mihaiolimpiu said:
The Motorola chargers are 850 ma usually, so it should work quite good!
Click to expand...
Click to collapse
Thanks. Printed on my Moto charger is 850mA so I'll rather use it for my OB next time.
BTW, currently I'm using a replacement charger for my OB with a name "super charger" printed "4.5v - 9.5v 800ma"
It's charging at normal duration in fact I'm using it for days. The only problem is that my OB touchscreen freaks out if I use it while that charger is connected. It's obvious when I run the multitouch testing app because touch points run all over the place. Touchscreen goes back to normal if I disconnect the charger. I tested that "super charger" to my milestone and the same abnormal thing happens to the screen. What causes it?
Probably it's something to do with high voltage... I'd avoid using it if something like that happens to my phone..
Usually the USB style chargers are pretty standard... the speed with which they work are strongly related to the power (Amperes) they provide, the voltage "should" be pretty standard!
mihaiolimpiu said:
Usually the USB style chargers are pretty standard... the speed with which they work are strongly related to the power (Amperes) they provide, the voltage "should" be pretty standard!
Click to expand...
Click to collapse
Like chargers with detachable MicroUSB cable?
BoyBawang2 said:
I'm about to use a Moto Milestone 1 charger for OB but I'm afraid that it may harm the phone. Both phones are listed with MicroUSB 2. Any tips?
thanks
Click to expand...
Click to collapse
Battery experts say to try and use a charger that's rated half the power of the battery.
So for a 1500 mAh battery, a charger of 850 mAh should be a better option than a 1000 mAh one.
Yes, the 1000 mAh charger would charge the battery faster than the 850 mAh one but it will decrease the lifetime of the battery faster.
Just for be able to post new thread. Sorry.
Hello, I don't want to start a new thread so I'll ask here.
The charger that came with my OB seems to be damaged. It was working properly until last last night. My phone detects the charger but it won't charge. Got powermax turned on and it automatically turned off when I connected the charger, so I know my charger does have issues.
Tried banging the charger last night, connected it to phone and started charging, woke up to see that it stopped charging 2 hours ago. It didn't even fully charge my phone. Now I'm charging it with my pc via the USB cable. I noticed that the touch screen goes wild when I use it while connected with the USB.
Now, I'm planning to buy a Galaxy S2 charger. Is it safe to use? S2 and OB has almost the same battery capacity so I'm considering it. Any other suggestions? OB ain't popular here in the Philippines so finding accessories is a real pain in the a**.
Fitted a Corby 2 charger and it seems like they use Mini-usb too. Haven't tried charging with it though.
My original charger also died... Now I use the one that came with my bluetooth headset
So I guess using the OB charger on other stuff is okay too. USB is always ~5v.
You need to test the charger with something else to be sure, though.
I had the same touchscreen freaking out problem with my old LG KS20, whenever I charged it. Like it was shorted or something. So it maybe a problem with the phone itself.
roltzy said:
My original charger also died... Now I use the one that came with my bluetooth headset
So I guess using the OB charger on other stuff is okay too. USB is always ~5v.
You need to test the charger with something else to be sure, though.
I had the same touchscreen freaking out problem with my old LG KS20, whenever I charged it. Like it was shorted or something. So it maybe a problem with the phone itself.
Click to expand...
Click to collapse
So, you agree that I use a Galaxy S2 charger? I think it would be fine since my friend with an S2 used my charger to charge his phone and it went well. I'll ask him to buy me one tomorrow. Tnx for reply
Ok kabayan, don't forget to share here the result after u try gs2 charger. I too am looking for safe alternative to my milestone charger.
Standard port - standard voltage
Don't even bother, if it has a micro USB it should be fallowing the same standard as USB for charging (5V)...
Of course test the charger for any adverse side effects like screen flickering or short battery life, and don't use it if something like that occurs, but because of the standardized voltage and the fact that usually phone chargers have between 500 - 1000 mA, 99% of chargers work...
I still haven't found any incompatible charger for my phone and I don't even buy a phone if it has a non standard Charging/Data Port... it's just stupid... so no Iphone for me!
BoyBawang2 said:
Ok kabayan, don't forget to share here the result after u try gs2 charger. I too am looking for safe alternative to my milestone charger.
Click to expand...
Click to collapse
mihaiolimpiu said:
Don't even bother, if it has a micro USB it should be fallowing the same standard as USB for charging (5V)...
Of course test the charger for any adverse side effects like screen flickering or short battery life, and don't use it if something like that occurs, but because of the standardized voltage and the fact that usually phone chargers have between 500 - 1000 mA, 99% of chargers work...
I still haven't found any incompatible charger for my phone and I don't even buy a phone if it has a non standard Charging/Data Port... it's just stupid... so no Iphone for me!
Click to expand...
Click to collapse
Hello guys! I'm here for an update. For the past week I've been using a Corby 2 charger. And guess what, it works just fine! only downside is it won't charge it up to 100% (usually gets to 99% upon unplugging). And it charges the phone a little slower than the original charger. I always let the phone overcharge overnight to have 100% battery.
Since somebody stole my laptop (and my charger too) I'm using a ZTE Blade charger without problems...
Huexxx said:
Since somebody stole my laptop (and my charger too) I'm using a ZTE Blade charger without problems...
Click to expand...
Click to collapse
FUC* stolen how ? this it`s baaaddd ....
Has anyone found a wall charger that they're happy with? I have an Amazon basics 2.1 Amp one that charges OK and shows up as an A/C charger in the battery stats, but it's not as fast as the stock one (which already is slow).
I'd post a link to what I have, but the forum still sees me as a newbie even though I've been lurking around for a few years now.
domlazz said:
Has anyone found a wall charger that they're happy with? I have an Amazon basics 2.1 Amp one that charges OK and shows up as an A/C charger in the battery stats, but it's not as fast as the stock one (which already is slow).
I'd post a link to what I have, but the forum still sees me as a newbie even though I've been lurking around for a few years now.
Click to expand...
Click to collapse
i'm still waiting for the pogo chargers to go back on sale.
fionic said:
i'm still waiting for the pogo chargers to go back on sale.
Click to expand...
Click to collapse
Same... :crying:
If you don't really care about super fast charging time almost all usb wall chargers are the same because of the limitations of a usb cable. Just color, shape, and size might vary
I'm using the my hp Touchpad charger. It seems like it charges faster than the original charger. I'll have to test and see though.
Sent from my Nexus 10 using Tapatalk HD
I bought a pogo charger so it won't take up the micro usb slot and also safer charging with pets (or kids). If I'm lucky it will charge faster too.
the pogo charger uses the original samsung ac adapter though.. it doesn't come with one
I just use any random charger I have (I think I use an old Kindle one right now) and leave it charge while I sleep. I have no complaints and have a POGO on order.
I ordered the Powergen chargers for both the wall and my car. They supply 3.1 amps so whatever the max is that the N10 will take, it will get it.
Search for "powergen 3.1" on Amazon and you'll find both.
I'm using my Asus Transformer Prime charger with mine. It seems to work well.
Sent from my Nexus 10 using xda premium
scooterboy5 said:
I ordered the Powergen chargers for both the wall and my car. They supply 3.1 amps so whatever the max is that the N10 will take, it will get it.
Search for "powergen 3.1" on Amazon and you'll find both.
Click to expand...
Click to collapse
Nice tip - thanks. That and the POGO has to be about as fast as it gets PLUS with the second USB port I will be able to charge my phone and tablet at the same time, same charger.
scooterboy5 said:
I ordered the Powergen chargers for both the wall and my car. They supply 3.1 amps so whatever the max is that the N10 will take, it will get it.
Search for "powergen 3.1" on Amazon and you'll find both.
Click to expand...
Click to collapse
Thanks everyone for your input. I ended up ordering the Powergen 3.1 charger suggested above. I'll report back on what my experience is. I did note that one of the reviews of that item at Amazon says it charges the Nexus 10 well, so my hopes are high.
Next question - anyone know what happens if you plug in the POGO charger and a USB charger at the same time?
Your charger isnt going to make a great deal of difference in charge time. An updated and/or custom kernel will help a LOT more with that.
The AC wall unit isn't a charger, it's the power supply for the charger inside the N10.
Me and another N10 owner measured how much current the N10 draws from the PS and it was less than 1A, so the device isn't even asking anywhere near the max that the PS can supply. Unless there is someother reason and there very well could be, a larger PS "might" be a waste of time/money.
I think the N10 charger uses a special usb protocol which allows it to charger faster than most
invisibro said:
Your charger isnt going to make a great deal of difference in charge time. An updated and/or custom kernel will help a LOT more with that.
Click to expand...
Click to collapse
I'm intrigued; how is that? More importantly, does such a kernel currently exist? I started this thread in search of a second charger that just worked as well as the original one. I'd be happier if could find something that did better than the OEM.
jerryp7 said:
Nice tip - thanks. That and the POGO has to be about as fast as it gets PLUS with the second USB port I will be able to charge my phone and tablet at the same time, same charger.
Click to expand...
Click to collapse
What I can tell you is that both powergen units charge the N10 fine.
What I can't tell you is whether they charge the N10 any faster than the stock wall unit. I haven't done any testing.
I'm expecting my pogo cable any day, maybe I'll do some testing then.
There are so many differing theories here, who knows?
scooterboy5 said:
What I can tell you is that both powergen units charge the N10 fine.
What I can't tell you is whether they charge the N10 any faster than the stock wall unit. I haven't done any testing.
I'm expecting my pogo cable any day, maybe I'll do some testing then.
There are so many differing theories here, who knows?
Click to expand...
Click to collapse
Yes so many, maybe if someone would write to Mr google and ask him he would explains it to us hehehe
I have seen some dual USB port PS that are rated "total" for both "not" each port. How is this PowerGen 3.1?
Just check and it's listed as "shared", so that's 3.1A total.
The description clearly states that each port can supply up to 3.1A. If both are used at once, the 3.1A is shared.
EDIT - Post #6 has a quote from Kensington confirming the charger does not work with the Nexus Tablet
So been trying to get a dual-USB 2.1A charger to use with my Nexus 7 and my old desire-Z phone (I also have a 1st gen iPad so figured would be a nice perk for both ports to deliver that juice).
I even went as far as buying a new USB Cable thinking something was wrong with my cable and flashing a couple of different kernels (thinking it was maybe that).
Fact is whenever I plug my N7 into a Kensington AbsolutePower 4.2 w/ PowerWhiz (K39690AM), Battery Monitor Pro widget will say in green "AC Plugged", "Discharging", and if it does show "Charging", it's only drawing in around 130mA or so. But yet on my Desire-Z (G2) I plug that in, it'll show maybe around 500mA (it won't go over 1A because it's designed not to for smart phones).
However If I plug the N7 into a Samsung 2.1A charger that came with a Galaxy Tab 2 7.0, The N7 will show a power draw from the charger a little above 1,800mA (and then goes down to around 500 or less once it hits 99%), similar situation with the samsung charger + my G2.
So I'm constantly googling trying to figure out whats up, and the only thing I've come across are various reviews on Amazon (they list this as a Dual 2.1A USB charger), with some complaints saying they don't work with Asus Tablets and another saying it wouldn't charge much at all on his Nexus 10.
So I'm wondering... what's up with that, and why does it not say it's not compatible on the box (though guess they sort of did by excluding Asus and Google from the list of brands on the side).
Its charging. Just the os is not showing it properly
Sent from a phone that's 2 Note-worthy, via XDA Premium HD app.
madman604 said:
Its charging. Just the os is not showing it properly
Sent from a phone that's 2 Note-worthy, via XDA Premium HD app.
Click to expand...
Click to collapse
As I said, I'm using Battery Widget Monitor Pro. IF it was only the OS it would show the exact same deal with the Samsung 2.1A Charger, Nook 1A charger, HTC 1A charger. But instead on ALL chargers except the Kensington one, it shows a much higher charge rate (on the 1A around 800mA charge, on the Samsung around 1.7A charge).
But on the Kensington one never more than 500mA (usually around 300-400). I even exchanged the unit for a new one, and still the exact same behavior. I think the powerWhiz feature of the charger is detecting it not as a tablet but rather as a generic USB Device and is not providing more than 500mA for 'safe' charging. Just like how it won't charge my phone past 1A since it's detected as a SmartPhone even though it's a 2.1A port.
kbeezie said:
As I said, I'm using Battery Widget Monitor Pro. IF it was only the OS it would show the exact same deal with the Samsung 2.1A Charger, Nook 1A charger, HTC 1A charger. But instead on ALL chargers except the Kensington one, it shows a much higher charge rate (on the 1A around 800mA charge, on the Samsung around 1.7A charge).
But on the Kensington one never more than 500mA (usually around 300-400). I even exchanged the unit for a new one, and still the exact same behavior. I think the powerWhiz feature of the charger is detecting it not as a tablet but rather as a generic USB Device and is not providing more than 500mA for 'safe' charging. Just like how it won't charge my phone past 1A since it's detected as a SmartPhone even though it's a 2.1A port.
Click to expand...
Click to collapse
The N7 has a circuit to detect whether the USB cable is plugged into its charger or into a regular USB port. The N7's charger shorts the two data pins. If your charger doesn't short those two pins, the N7 will never go into "high charge" mode.
There is a simple mod to do. Either take the charger apart and short what the data pins should be on the usb port or short the data wires together in a cheapo usb cable at the micro usb side. That will make a charge only cable but it will give. What you need.
Sent from my SPH-D710 using xda premium
So turns out I wasn't crazy after testing two of their chargers.
Dear Karl:
Thank you for contacting Kensington Technical Support.
We understand that our Absolute Power™ 4.2 Dual Fast Charge is not charging your Nexus tablet properly, we regret to inform you that Absolute Power™ 4.2 Dual Fast Charge for Tablets is not compatible with Nexus Tablet, hence we would be glad to refund you the amount.
If the date of purchase is within 90 days, we request you to utilize the 90-days Money Back Guarantee policy.
Please click on the following link to know about the 90-days Money Back Guarantee form
http://www.kensington.com/kensington/us/us/s/1570/90-day-money-back-guarantee.aspx
We are sorry for the inconvenience caused.
If you need further assistance, please feel free to reply to this message.
For any further assistance please feel free to reply back to this email or you may want to call us on our toll-free number 1800-535-4242, Mon Fri 07:30 am to 04:30 pm PST.
Please Read This!
Kensington Technical Support incidents are only processed via our support web site, not via email. Please do NOT reply to this email, but rather you must click on the link below which will bring you to the Kensington Technical Support web portal where you can initiate questions, modify your active incidents, or perform maintenance on your support account.
Again, please do NOT respond to this incident via email, please click on the link below to access your support incident. Thank you.
http://www.kensington.com/kensington/us/us/s/1708/mystuff.aspx
Kensington Computer Products Group
Regards,
Shiva Kumar
Click to expand...
Click to collapse
graydiggy said:
There is a simple mod to do. Either take the charger apart and short what the data pins should be on the usb port or short the data wires together in a cheapo usb cable at the micro usb side. That will make a charge only cable but it will give. What you need.
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
Yea... I'm not taking apart a charger. I just returned the second one to the store where I got it and got one that did work. Also that method won't work with the kensington, with it's powerwhiz feature if it can't detect the device it'll limit to 500mA for safety.
Besides I've already returned the second charger (I exchanged the first one, re-ran tests, etc), and ended up getting an RCA 4-outlet power strip/surge protector that has two USB ports (one for 2.1A charging) that does work.
All android devices look for 200ohms on the data pins to determine if it is a charge vs data source. Except the handful of proprietary connections (ex:Nook Color).
Yep. All things said in this thread are true. What I've found to work great with the stuff I already have is a Samsung Galaxy S4 charger. That thing
charges the N7 at about 1500 mA. Measured with my multimeter. It's weird though,
it'll start around 800mA and after about 45s to a minute it will start pulling in almost double that.
Crazy.
Just experiencing the drain of death...
Backstory:
Bought this tablet at a pawnshop and battery was dead for 10$.
Came home and recently had pulled a pile of USB chargers out of the dumpster.
Plugged it into random charger.
Let sit for couple hours, got battery ? sign.
Left over night, battery with critical red sign.
Left another day and almost 35% charged and then was able to turn on.
Corrupted android install and rescue.
Few days of searching, found all the webdoctor files, update script, restored, upgraded to latest webos.
Added PAC-ROM 4.4.4, ran great.
Upgraded to 5.1? Ran like crap and then horrible battery drain.
Left it alone for a few days and died all the way.
The fun part:
Wouldn't charge. Tried 5 different USB chargers, all 2A. No sign of life at all.
Start to think back over the steps and realized...I hadn't tried the first charger I used!
Pulled it off my raspberry Pi cause I knew it was a 2Amp.
Plugged in the tablet. INSTANT BUTTON LIGHT!!!
Left overnight. Hard Reset gets me ? battery logo. Still charging and waiting.....
Differences:
Samsung Galaxy USB Charger - 2Amp 5.3V!
Reports online say some put out as much as 5.6. Most agree the battery charge circuit will regulate the excessive voltage down on 95% of devices.
You can find them online for 5$. Someone else try a 5.3v charger and confirm this.
Explains why my Raspberry was running hot as well..
Haha my sister just asked if she could use my HP touchpad, couldn't find the charger, my Samsung Note 3 charger will get it going, but once it dies dies and I plug it in, it will need a solid 20 minutes before I can get it to hit 0 percent and turn on. I just ended up buying some chargers and cables based on TheWireCutter website that has a ton of information about both chargers and cables... seriously I ended up spending probably nearly an hour looking at just different micro usb cables (they are not all made equal) obviously length of the cable and gauge can affect the max amp it can put through... ended up buying EZOPower Extra Long 6ft Black Micro-USB. Even though they didn't have the highest rating in terms of consistent amp the only better ones were 3 foot long cables, and I really wanted the 6ft. For charger I got Anker 24W 4.8A 5V charger with 2 usb, which makes each one output 2.4A 5V and 12W with a high reliability. So I'll see if 5V will make it haha.
The stock HP charger than comes with the Touchpad is 5.3v...
I find that for the BEST and fastest charge, you need to hit that sweet spot of 5.3V. Anything that puts out less will take practically an eternity or not charge at all really.
darranwil said:
...[-SNIP-]... Samsung Galaxy USB Charger - 2Amp 5.3V!
Reports online say some put out as much as 5.6. Most agree the battery charge circuit will regulate the excessive voltage down on 95% of devices.
You can find them online for 5$. Someone else try a 5.3v charger and confirm this. ...
Click to expand...
Click to collapse
theronkinator said:
The stock HP charger than comes with the Touchpad is 5.3v...
Click to expand...
Click to collapse
Yes, theronkinator is correct about the voltage ratings.
My perception is that the TouchPad is a picky eater when it comes to chargers and USB cables -- even more-so in webOS than Android. I suspect webOS is coded to fight, resist, or flat-out refuse connection with any charger that doesn't precisely match the current and voltage specs of the HP charger. Apple seems to be the same way.
Keep in mind that the USB cable can play an equally-important role in the charging circuit. Some of the cheap USB cables are wired for charging only. I recall reading something years back that the original HP TP cable was wired differently from standard USB cables. I think it had something to do with resistance across certain pins, but I'm not sure.
It's a sad fact of e-waste that more than a few HP TPs and iPads have found their way into land fills, just because the owner used the wrong charger and/or USB cable and then blamed the tablet for not charging.
---------- Post added at 06:33 PM ---------- Previous post was at 05:53 PM ----------
As I said in the above post, there is a physical difference in the HP TP USB cable. Details, courtesy mpgrimm2, can be found here.