Database Develop

[Q] USB Charging with Pc/Mac

I'm having an issue,and seems not just me,that I can't charge the Tab via usb connected on a laptop or a Mac book (pro).
I'm wondering if its firmware related, I've tried JID and JI6 same issue.
Are you guys having the same?
If someone is not having this problem can please be so nice to tell me the firmware version?
Thanks

no, you cannot charge the tab from a PC usb slot cause of some minimum power requirements which was the same way with ipad

chowdarygm said:
no, you cannot charge the tab from a PC usb slot cause of some minimum power requirements which was the same way with ipad
Click to expand...
Click to collapse
No is not the same than ipad, ipad is possible to recharge with new macs (that what apple says on the web site, the don't say how new though). But is true the iPad has 2A battery versus the Galaxy Tab that has 4000mAh, I was hoping that there was a way to recharge it (slowly but at least to keep it alive when is connect)

zerocool76 said:
No is not the same than ipad, ipad is possible to recharge with new macs (that what apple says on the web site, the don't say how new though). But is true the iPad has 2A battery versus the Galaxy Tab that has 4000mAh, I was hoping that there was a way to recharge it (slowly but at least to keep it alive when is connect)
Click to expand...
Click to collapse
no idea on that. i didn't keep my tab connected so long to pc but whenever i connect it to pc it shows on battery with cross mark on charging symbol. may be will test it this weekend

charging
hi guys,
mine is also showing the non-charging-sign but it charges slowly - get juice plotter and try it your self

Can I recharge the Tab in the car sigarette ligther socket with USB adapter?

Portos61 said:
Can I recharge the Tab in the car sigarette ligther socket with USB adapter?
Click to expand...
Click to collapse
check this out, they have the adaptor for cigarette...
http://www.thinkgalaxytab.com/universal.html
I found the link above on google, but I've seen other around the web.So I think you can

hipath said:
hi guys,
mine is also showing the non-charging-sign but it charges slowly - get juice plotter and try it your self
Click to expand...
Click to collapse
Mine is the same guys... I left my AC charger at work over the weekend and have been charging it via USB the whole time... Slow but it gets there if you leave it on over night!

Mine won't charge unless I use the power adapter from Samsung

Mine does charge but slowly from USB.... you should also know that different PC boards and laptops have different power outputs.... in most cases, your tab should charge very slowly on USB power. Mine charges and has BT and Wifi on also... but with heavy use and plugged in to my laptop, it may offset and drain ever so slightly....
Same thing goes for car chargers... if not rated for higher output, it will charge VERY slowly. The original Samsung car charger has a much higher power output. If you can find one that has the same aftermarket USB car adaptor for Ipad charging, that should work too

eskasi said:
The original Samsung car charger has a much higher power output.
Click to expand...
Click to collapse
Indeed (yet it is very compact and doesn't get hot).
Related discussion here:
http://forum.xda-developers.com/showthread.php?p=9172163#post9172163

I tried my iPad charger - output rating looks to be the same - but it didn't work very well.

brucewilsonpa said:
I tried my iPad charger - output rating looks to be the same - but it didn't work very well.
Click to expand...
Click to collapse
The contacts on mine are upside down compared to an iPad/iPod/iPhone charger. The blade on which the contacts sit is also higher in the charger slot than an iPad charger. How did you get it to fit without breaking something?

Some PC:s (motherboards) have so weak power output via USB, that they just barely provide a mouse and a keyboard but nothing more.
So anyone should not expect it to be enough for charging Tab.
Tab's own power supply gives 2 Amps out!
My experience about car-usb-adapters: one can charge Tab, other quite similar for some reason not. However, both charge Galxy S fine.

Just something to keep in mind as an option... Usb 3.0 will give more juice to usb cables than current usb ports. Apple has "cheated" and already increased the power to the regular usb ports on their newer laptops on par/better with usb 3.. So... If you get usb 3 cards installed you'll have a port with enough amps to charge the tab. Easier/cheaper to just buy a pdmi cable but if you are about to upgrade to usb 3 its more incentive to do so.
Sent from my SCH-I800 using XDA App

Regarding the ipad charging you can use the below link to to download an ASUS program that will boost the USB power for Windows this works for the ipad and it's showing as charging when connected to my PC this may also work for galaxy tab
http dlcdnet.asus.com/pub/ASUS/misc/utils/AiCharger_V10006_XpVistaWin7.zip

Charging using usb on my mbp does take a long time. I timed it and it took at least 6 hours to charge from completely empty to full. Its ok since I plug it in when I'm about to go asleep and by the time I'm up its fully charged.

essahar said:
Regarding the ipad charging you can use the below link to to download an ASUS program that will boost the USB power for Windows this works for the ipad and it's showing as charging when connected to my PC this may also work for galaxy tab
http dlcdnet.asus.com/pub/ASUS/misc/utils/AiCharger_V10006_XpVistaWin7.zip
Click to expand...
Click to collapse
Careful with that.
Seems it has the not-uncommon tendency to screw up USB drivers to the point that mice and keyboards won't work either, especially on Win7 and Vista X64 machines. It got me, had to do a system restore to fix it. Neat idea though.

pdiddypdiddypdiddy said:
Apple has "cheated" and already increased the power to the regular usb ports on their newer laptops on par/better with usb 3.
Click to expand...
Click to collapse
USB port should give at least 500mA. But anything more is OK. So Apple can make their USB ports to give anything over 500mA and it is well within the standard. Actually it is good for everyone because if Apple port can give 2A you can use non powered hubs and have power for lots of USB devices.

Actually the Tab charges fine (albeit slowly) from a USB, you just have to be aware of a few things. Firstly as mentioned above some USB ports provide more power than others. Try the different ports on your machine and you'll soon figure out which ones work best. Secondly, while the Tab will display the "Connect your charger" message, it is actually charging. Go into Settings, About Phone, Status and watch the battery level. It'll take a while but will creep up. Finally, it charges faster when the Tab is switched off. ie: if you're actually using it, you won't get a charge, if you have it in standby with screen off, it'll charge slowly (takes most of a day for a full charge) and if the Tab is switched off, it'll go a lot faster (though still not as fast as with the power adapter.)
This is good to know as you can plug it in to your computer and let it set on your desk at work all day and know that it is slowly trickle charging.
I also found that plugging the USB cable into an Apple adapter (from an iPhone) brought up the same "Connect your charger" message, but did charge the Tab, faster than a USb but not as well as my samsung plug.

Friend purchasing nook for me. Should I get anything else?

I have a friend who is visting the US (I'm from Canada) and I asked him to pick me up a nook. Not finding clear info in some of the reviews, mainly concerned about charging.
This charges over usb when hooked up to your computer right? Just want to make sure it doesn't use a proprietary cable for charging. I read on the ipad side, that older computers don't give out enough power to charge over usb, is that an issue with the nook?
What adapters/cables does it come with exactly? And is it just a standard mini-sub for the charging?
Also, this has a headset jack correct? I've read no bluetooth, I guess there's no way to get a mic working on this then.

Micro USB, will charge VERY slowly using a computer. Includes a 2amp wall socket and special cable to quick charge (still micro usb, just more pins). Has a headset port but does not come with a headset.

I've only had a few mobile devices. I read the ipad can charge over usb if the mobo supports giving out that extra juice. Some mobo's have a new firmware update to enable this.
The connector is micro-usb but just more pins. Hmm. so if the cable breaks or I misplace it no other micro-usb will charge it?
edit: i read a little more and found that it's 30 pin proprietary cable to speed up charging. I also read the galaxy tab does something similar.
Does anyone know if they use the same pin configuration? probably not, but I can get tab usb cables here.

I know you didn't ask for it but I'll tell you anyway
In case you are worrying about registering your device (mandatory at initial setup).
I'm NOT in the US and it worked fine.

Good to know. Thanks.
But I'm more concerned about charging it and relying solely on their cables.
I read the ipad can trickle charge on newer computers but some wouldn't provide enough power. Asus et al have released utilities to increase the power to the usb ports.
I can't post the links but endgadget has an article about it providing links to those utilites. They just talk of apple devices but does this work with the nook?

It comes with a charger for US-type sockets and only if you charge your nook with this (and yes, it is proprietary ) it'll charge quickly. It does seem to charge when you connect it to a standard PC USB port but at an extremely low rate.
On the device Micro-USB (not Mini) is used.

You say it does seem to, do you mean from personal experience? How slow? It sounds like that if you do own one it was so slow you didn't let it finish.
Like if it's 8hrs overnight, I can live with that, but I want to confirm that there is a plan b and not solely rely on their cables.
And as I mentioned asus and others released utils to give more power output to the usb (although these seem like their were only created for ipads). Wondering if those utils speed things up.
for ex, google asus ai charger to see what I mean.

I received my nook Color a mere few hours ago so I can't tell you a lot about its charging behavior It "seems" to load slower via standard USB... if you want to know about the details check one of the large threads on the NOOK and its rooting. I remember reading some information about the USB connector and its peculiarities there.

Ah you just got it. I see.
I found this on the root thread:
'
"There are 12 pins coming off the connector. It looks like there are no pins for the standard micro USB portion, only the extended 12 pins. 2 pins are used to bring in +5V, 2 pins are for signal ground providing a hefty circuit for the 2A charging. USB takes up two pins, and as far as I can tell 2 more are for each LED via current limiting resistors. Two more pins go to discretes that I haven't identified, and two more pins are unconnected. I'll take my scope to them when I have some time."
Not sure what he means when he says no pins for the standard micro portion...

Maybe the plug doesn't have standard USB pins, but the NOOK itself does have standard USB pins as well as the proprietary ones. Because I have trouble inserting the original B&N plug, I went out earlier today and bought a standard Micro USB cable...
I connected it to the nook and it said "not charging", so I went out to do some shopping (10-20 minutes max) and left it at 89%... when I came back it was at 93 %.
So it DOES in fact seem to charge albeit slowly.

Thanks. It's weird, lots of comments of its own cable not fitting properly.
As long as it charges with a normal cable I'm good.

I guess it is charging... however there is a slight chance, that it's NOT charging and the battery charge display is lying (de-calibrated). I don't think so, but I'll only know for sure after a few more days of using only the standard USB charger cable.

[Q] Cheap replacement USB cable?

Hi guys, I accidentally left my charger and USB cable at a friend's house 700 miles away during a visit. She sent it back to me, but it's been a bit over two weeks and I'm tired of being Nookless, especially with all of the new stuff developing (cyanogen on the way? AWWW YEAH!!).
Neither of the two BN stores near my house have replacement charger/cables in stock and it appears that the BN website does not either (not even a price listed, just a pic/description).
What is the cheapest way for me to get some power in this thing? I wouldn't mind charging solely through USB. Is the stock NookColor USB cable any different than a normal micro-usb cable? Can I just order a normal $2 cable from amazon and expect it to charge?

The cable that comes with the NookColor differs from a standard micro usb in a couple of important ways: It has extra pins to deliver a higher charge. OK, I guess by "a couple" I meant "one that I am aware of." Alright, maybe one more: The charger itself is rated at .5A, which is higher than the standard plug for usb chargers.
You might be able to trickle charge from a standard usb. I was able to get some power, but not much.
Here's one more thing to do:
Ask the manager at B&N if she has any extra chargers and cables in the back. Here's why I say this: I had to return my cable yesterday because it wasn't making proper contact with the pins and thus was not properly charging. The manager told me that he has a heap of NookColor plugs and cables in a box because when they send units back to wherever they send them for repair or reconditioning, they are instructed to send only the Nook, and not the cables.
It's worth a try.
Good luck.

It does charge very slowly when connected to the PC...It will charge overnight if not in use..

I have some Nokia cables (from my mobile) with Micro-USB, they are loading the Nook nearly as fast as the original one. Very handy for charging in the car.

I have been charging my nook with only a standard cable since day one. My nook came with a bad cable and at the time was one of the last nooks in my area. I have been calling B&N almost weekly for over a month and they keep saying they will send me a cable but I have not received it yet. I have had no problems charging my Nook overnight. I even emptied the battery once and it still charged fully over night.

A regular microUSB cable will eventually charge the NC, if it's sleeping. No 3-hour quick-charging, though.

Does the slow charging really have to do with the cable?
On high draw devices (e.g. iPhone or Palm Pre) the charger shorts the data pins to signal the capacity for higher current draw. The cable has nothing to do with it.
I have noticed the Nook plug is longer than a standard micro USB plug, but that only means you can't use the Nook cable on another device's micro USB port.

Anybody know the potential problems trying to root with a non-standard Cable?

mageus said:
I have noticed the Nook plug is longer than a standard micro USB plug, but that only means you can't use the Nook cable on another device's micro USB port.
Click to expand...
Click to collapse
Is this confirmed to be true? If so, what allows a non-Nook USB cable to be used with the Nook?
I'm sure the cable itself is different, either by using the data lines as additional power lines for higher current capacity, or perhaps by adding some resistors to pull the data lines to certain voltages so that the Nook can identify when the "right" cable is connected, so that fast-charging can be enabled. I just can't quite grasp the idea that the cable is not physically compatible with other micro-USB devices.

I am able to use the original nook usb cable, my samsung moment usb cable, and others for data purposes, no issues

I have two other devices that also use M-USB for data transfer, and they work just fine.
I picked up a few of these a while back and they work as well:
http://www.newegg.com/Product/Produ...&cm_re=micro_usb_cable-_-12-119-265-_-Product

It seems that you can call B&N support for a new one if you had issues with your original. Not the OP's problem, but Some have had the issue.
Here is a thread about it:
http://bookclubs.barnesandnoble.com...t-to-slide-charger-into-Nook-Color/m-p/809920

nootered said:
I have two other devices that also use M-USB for data transfer, and they work just fine.
I picked up a few of these a while back and they work as well:
http://www.newegg.com/Product/Produ...&cm_re=micro_usb_cable-_-12-119-265-_-Product
Click to expand...
Click to collapse
So the idea is that these could be used only for data and trickle-charging? Even if it's connecting the Nook to its official power-thingy (is there a name for those?)

markiejones said:
So the idea is that these could be used only for data and trickle-charging? Even if it's connecting the Nook to its official power-thingy (is there a name for those?)
Click to expand...
Click to collapse
I am just using it for data transfer and charging with the stock wall unit. As far s using these cables or other USB devices that using the MicroUSB interface would require some type of software driver (USB Host) in order to make that work. As far as I know at least.

manchucka said:
Alright, maybe one more: The charger itself is rated at .5A, which is higher than the standard plug for usb chargers.
Click to expand...
Click to collapse
Actually... .5A is the minimum for all plain jane USB ports.
If I remember right, when I flipped the charger over when I first got the NC, it is rated at 1.9A, which would make sense considering the size of the battery we are charging and at the speed we are charging it at. Hell, my Epic uses a 1A charger and it is only 1500mAh battery vs the NC's 4000 mAh.

danbutter said:
It seems that you can call B&N support for a new one if you had issues with your original. Not the OP's problem, but Some have had the issue.
Here is a thread about it:
]
Wow thanks for that link. From the day I got my Nook I couldn't use the included USB cable to move data, but it would charge like a charm. Now I'm getting a replacement.
Click to expand...
Click to collapse

danbutter said:
It seems that you can call B&N support for a new one if you had issues with your original. Not the OP's problem, but Some have had the issue.
Here is a thread about it:
http://bookclubs.barnesandnoble.com...t-to-slide-charger-into-Nook-Color/m-p/809920
Click to expand...
Click to collapse
True but.... I have been calling for well over a month and first they could not ship me one because I bought it at Best Buy and they did not have the warranty info yet from Best Buy. I finally got past that and since the week after Christmas they have been shipping me one each time I call. I have yet to receive one. I am going on 2 months now trying to get the cable shipped to me.

TainT said:
Anybody know the potential problems trying to root with a non-standard Cable?
Click to expand...
Click to collapse
I don't think there are any.. I do all my ADB work using a "non-standard cable". The usb cable that came with my nook wont let ADB work right. When I type ADB devices with my factory cable I get the serial number but instead of device it shows suspended or something like that.

http://www.rdi.us/USBCC.pdf
Here is a link for a Hi - Power USB Car Charger. It's 2100mA and can run and charge an Android Tablet or iPad at the same time. Also the microUSB cable they offer, shows "Charging ( AC) ” When plugged into my Captivate. Most just showed "Charging ( USB) ".
Sent from my Samsung Captivate with Perception 10.3, Firebird2 v0.8 #77 Kernel, Firmware 2.2.1, Modem T959TLJL3 using XDA App

.5A is nothing. Most phone chargers now are rated at 1A with ones for tablets going above 2 as someone else mentioned. Most BT headset chargers are rated at .2-.5A in comparison. Some GPS units have charges rated over 1.5A. My Dash unit had a 2A.
And if I'm not mistaken, if you're connected to a computer you will only get a tricklish charge as it's limited to .2 or .25A (I believe).
In regards to actual cables, any microUSB cable will work. I've used stock ones from Samsung and Palm phones as well as cheap 50 cent ones from Meritline. And if the Nook one is actually longer? Why wouldn' it work in something else? The cable will just stick out further.
manchucka said:
The cable that comes with the NookColor differs from a standard micro usb in a couple of important ways: It has extra pins to deliver a higher charge. OK, I guess by "a couple" I meant "one that I am aware of." Alright, maybe one more: The charger itself is rated at .5A, which is higher than the standard plug for usb chargers.
You might be able to trickle charge from a standard usb. I was able to get some power, but not much.
Click to expand...
Click to collapse

[Q] Recharge via Computer USB Port?

I got the 16GB Touchpad few days ago and since i got the one with an american charger i cant charge it yet (till i get the traveler kit).
My actual problem is that it doesn't charge through the USB port too. I left it for like 24-30 hours charging through the USB port (with the cable that came with the touchpad) and when i try to turn it on, it shows me an icon of an empty battery.
Is my usb cable problematic or it just that the touchpad cant charge through the usb port from a PC?
ps: every time i plug the usb it get a message telling "to reliably charge please use the charger and cable that came with this device"

I have the same issue with a 32 GB one. I received it brand new, factory sealed today and it is going back to HP. I called HP, the cable is fine, works with my HTC phone, it's the USB port on the Touchpad, it's loose and losses connection. HP is sending a box with prepaid shipping label and doing a warranty repair.
I really love the Touchpad and I am a bit disappointed with receiving a new device with a loose USB port. HP has great support and I can't wait until I get it back.
Sent from my HTC Sensation 4G using Tapatalk

Unfortunately thats not an option for me (returning it to touchpad), since i bought it from Ebay (thats the only way possible for me to buy a touchpad from my country).
You had the same issue with the charger plugged in the usb cable as well?

What sort of power source do you use, if not the charger.
I've tried to use a computer, but it does not look like it's charging, but data transfer work.
I tried with an iphone charger, that sort of work. It complains about not getting enough power (iphone charger is 5,0V while the hp charger is 5,2V)
Bottom line. Use the original charger, just buy an us adapter. It works great.
There is another thread here sonewere discussing chargers for non US owners.
Sent from my M9 using Tapatalk

Jon (aka nle) said:
What sort of power source do you use, if not the charger.
I've tried to use a computer, but it does not look like it's charging, but data transfer work.
I tried with an iphone charger, that sort of work. It complains about not getting enough power (iphone charger is 5,0V while the hp charger is 5,2V)
Bottom line. Use the original charger, just buy an us adapter. It works great.
There is another thread here sonewere discussing chargers for non US owners.
Sent from my M9 using Tapatalk
Click to expand...
Click to collapse
Im trying to charge it through my PC using the original cable that was in the box (tried it in a USB 2.0 port) and im getting the 'try a reliable recharging source like the USB cable and the charger that came with your touchpad'.
I also tried charging it with a 5.0V 200mA phone charger but it didnt work either.
Shouldnt it charge even a bit with the cable? im trying to charge it for 2 days now

Varemenos said:
Unfortunately thats not an option for me (returning it to touchpad), since i bought it from Ebay (thats the only way possible for me to buy a touchpad from my country).
You had the same issue with the charger plugged in the usb cable as well?
Click to expand...
Click to collapse
Yes, tried the wall charger, then pc, a different usb cable, all had the same result. When I plugged in I could feel the USB port loose in the Touchpad itself, it had a bit of play and if I played gently on it, it would begin to charge or connect to the pc. When i let go, it disconnected from my pc and then gave me the charging error message. I purchased mine from an e bay store and it has a warranty for 1 year.
I would be happy to help you with yours, if you want to ship it to the US, it has a warranty from the factory. Pm me if you'd like help. I am certain that shipping to and.from US could be costly but I am willing to help.
Sent from my HTC Sensation 4G using Tapatalk

Mine will only will charge from official HP chargers. This is much like my old iPhone 3g before all the generic manufacturers caught up. I suspect that the voltage and amp requirements are tighter than the USB specification, so it will be a crap shoot if you use non HP chargers.
With that said, HP has 30% off all touchpad accessories right now. Combine it with the cupon SAVE15HP
-W
Sent from my I897 using XDA App

wpp105 said:
With that said, HP has 30% off all touchpad accessories right now. Combine it with the cupon SAVE15HP
Click to expand...
Click to collapse
Ya unfortunatelly i could order anything since i dont live in the US/UK regions

Varemenos said:
Ya unfortunatelly i could order anything since i dont live in the US/UK regions
Click to expand...
Click to collapse
Don't worry over that, I can get what you need and ship it to you.
Also, in speaking to HP, any USB charger in the US works, they're considered universal.
Sent from my HTC Sensation 4G using Tapatalk

you cant charge the touchpad using a computers usb ports. it doesnt draw enough power. the voltage of the charger doesnt really matter, it needs at least 2 amps or it wont charge the touchpad. cell phone chargers usually only draw 1 amp or less and usb ports only .5 amps.

cachookaman said:
you cant charge the touchpad using a computers usb ports. it doesnt draw enough power. the voltage of the charger doesnt really matter, it needs at least 2 amps or it wont charge the touchpad. cell phone chargers usually only draw 1 amp or less and usb ports only .5 amps.
Click to expand...
Click to collapse
That is absolutely not the case.
I have only charged mine once with the AC-USB thing and I have been using it since I got it the first day of the sale. I use mine all day long and only charge it occasionally via USB to PC connection. I use the original cable from HP and another one from my Samsung Mythic (work and home).
The message that you get when you plug it in is misleading but normal on a stock TP. However there is a patch in PreWare that changes it to just default to charge and not bug you. Anyone who intends to use this thing at all with WebOS needs to get PreWare installed. In fact, some time spent at precentral.net would benefit any new owners. You will learn A LOT more about these little jewels. I spent a few hours reading stickies and interesting threads and learned a great deal.
If it is really plugged in (and you will know because your PC will tell you) and you get no charge, you have a problem. It should charge on or off while plugged in - mine does.

nunjabusiness said:
That is absolutely not the case.
I have only charged mine once with the AC-USB thing and I have been using it since I got it the first day of the sale. I use mine all day long and only charge it occasionally via USB to PC connection. I use the original cable from HP and another one from my Samsung Mythic (work and home).
The message that you get when you plug it in is misleading but normal on a stock TP. However there is a patch in PreWare that changes it to just default to charge and not bug you. Anyone who intends to use this thing at all with WebOS needs to get PreWare installed. In fact, some time spent at precentral.net would benefit any new owners. You will learn A LOT more about these little jewels. I spent a few hours reading stickies and interesting threads and learned a great deal.
If it is really plugged in (and you will know because your PC will tell you) and you get no charge, you have a problem. It should charge on or off while plugged in - mine does.
Click to expand...
Click to collapse
The problem is, its plugged, i get the warning but its not charging at all (while the touchpad is turned out cause its out of battery the past 2 days).

Varemenos said:
The problem is, its plugged, i get the warning but its not charging at all (while the touchpad is turned out cause its out of battery the past 2 days).
Click to expand...
Click to collapse
Now to be completely honest - the first charge I made out of the box was with the AC adapter and I left it in overnight like I had been told.
But since then I have never used the AC plug and I have let it get down to about 20% or so but no lower.
It very well may be that from a DEAD state, it requires the extra amps to jump start it, but as long as you have that initial charge it is covered by the lower amperage of the direct USB-to-PC connection. I'm guessing it came with a fair charge and you burned through it without ever plugging it in to the USB.
Bear in mind that not ALL USB ports on a PC are powered the same either. Older USB 1.0 and 1.1 are crap for power. Front or top-mount ones also may not have as much juice as the ones in the back directly off the motherboard. Look at portable hard drives, some come with a double-header cable to use two low-powered ports. I know my top-mount ones will not power my 1TB 2.5-inch drive, but the ones in the back do.
However, I am really surprised you can't pick up a standard plug in USB adapter for your country for a few dollars (equivalent) for wall. Jeez they sell them at the dollar stores here now. I don't know if a car adapter would output enough to do it but that is another idea. If you can get one, you should be able to bring it back easily enough. The 2 amp adapter does charge a lot faster.
---------- Post added at 11:15 PM ---------- Previous post was at 10:53 PM ----------
LOL, I am really in a rare mood as this question has bugged me a little. So I decided to find some straight poop. Here is the best description I have seen anywhere.
http://www.maxim-ic.com/app-notes/index.mvp/id/3241
If you don't want to read it, the gist (as I understand it) is:
At 5V, the USB ports in a PC have to be able to source (provide) at least 500 mA (.5 AMP). However, depending on how your motherboard is provisioned (MOSFETs and diodes) that is limited/controlled.
The spec though, does allow as much as 5A to be provided. In fact, 2A is not uncommon if the other ports are not loaded.
So you could try unplugging all your other USB stuff or try another computer's USB ports.

Varemenos said:
Im trying to charge it through my PC using the original cable that was in the box (tried it in a USB 2.0 port) and im getting the 'try a reliable recharging source like the USB cable and the charger that came with your touchpad'.
I also tried charging it with a 5.0V 200mA phone charger but it didnt work either.
Shouldnt it charge even a bit with the cable? im trying to charge it for 2 days now
Click to expand...
Click to collapse
Given that the HP charger has a 2A output, odds are that anything much below around 500mA isn't going to charge the device, or at least not at a rate that'll offset the drain while it's running.
The USB ports on laptops often won't supply enough current, particularly if there's other devices on the same bus. If you plug it into a powered USB hub then you should be in business as they should supply more like around 1A generally.

My Touchpad charges from my laptop USB port, however it is slow. I am getting about 8 - 10% charge per hour. The screen needs to be off though, otherwise there is no noticable charging happening.

Mine is not charging with USB laptop at all. Need to use wall charger

I have XRON VB2.8 on my two touchpads and both show battery charging symbol when they are connected to computer via USB and yes the they charge very slow.

FYI, can't remember if WebOS / Govnah tells you what the current amps being used is, but if you are on Android tools like Elixir 2 tell you how many amps you are either discharging (-) or charging (+). So depending on what you are using (wifi, bluetooth, # of widgets, running applications, screen brightness, overclocking, underclocking, etc.) YMMV on whether or not you can charge via usb connected to your computer.
So if you are discharging at a rate of -750 mA connecting to a usb port on your computer will still have you discharging at a rate of -250:
Code:
[COLOR="Red"]-750 mA[/COLOR] + 500 mA = [COLOR="Red"]-250 mA[/COLOR]

mine charges in the usb port, but only if I turn off the screen or turn off the touchpad completely. my ports only provide 500mA, and with the screen off, the touchpad draws about 50mA, so it can charge at about 450mA. With the screen on, it draws about 760mA, so even when it's plugged in the USB, it is discharging at a rate of about (760-500=260mA).

[Q] Need a better charger cable when plugged into my work computer

So to my understanding the 2a that is supplied to our phones when plugged into the wall is due to the wall part and not the cable. Is there any difference in the cables that could provide me a better charge? I leave my phone plugged into my work computer most of the day and it doesnt seem to give it much of a charge. Is this something wrong with the USB port itself (can you systematically change the output provided on your computer? I wonder if t would make a difference in the front vs back usb ports.
Also I am not against getting a nice dock for it while its here at work but I like to keep it in landscape mode. If anyone knows of one available to keep it on with a clock or something and still eb able to charge it I would be appreciative.
Thanks in advance.

The computer usb ports are normally limited to 500mA. The oem wall charger is 2000mA. So you get 4x the current when plugged into the wall. On top of that some chargers have basic circuits in them that the phone recognizes so it knows to pull more current. If you want a fast charge use the supplied wall charger.
Sent from my SCH-I605 using xda app-developers app

i do wonder about this too, as my iphone will charge (sufficiently) thru pc, but the note 2 takes forever

Do they sell or could you make a cable that has two usb plugs on the end, one that will plug into the computer for syncing and one that could plug into the oem wall charger for fast charging.
I would think you could use the two data wires in the usb to connect to the computer and the two power wires to go to the wall charger. Would be really easy to do and only require an old usb cable for the second male USB A end.
Does anybody have any experience with this or know if its possible. The dock seems to have this ability but I would prefer not to purchase an expensive dock.

Some of the more advanced PC motherboards out there have one or two high-current USB ports that can be set for dedicated smartphone/tablet charging. Most of these are Intel Sandy boards as far as I know.
FWIW the Perseus kernel charges far faster IME than the stock kernel.

The iPhone charges "more" than the Note 2 because the iPhone's battery has a smaller capacity. (1440 mAh vs 3100 mAh) so basically every 1% of battery on the Note 2 is over 2% on the iPhone.
ronzza said:
i do wonder about this too, as my iphone will charge (sufficiently) thru pc, but the note 2 takes forever
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A

Before I bought the note, I had a sgs with cm10 and a kernel that supports fast charge. It neglects the pins used for data signal on the usb and makes it a power source only, and I'm pretty sure I got around 1mah with this method though I didn't measure it.
Should be no reason for it not to work on our phones if a kernel supports the method.
Sent from my GT-N7100 using Tapatalk 2

USB 3.0 changes from 2.0
MDavisiw said:
So to my understanding the 2a that is supplied to our phones when plugged into the wall is due to the wall part and not the cable. Is there any difference in the cables that could provide me a better charge? I leave my phone plugged into my work computer most of the day and it doesnt seem to give it much of a charge. Is this something wrong with the USB port itself (can you systematically change the output provided on your computer? I wonder if t would make a difference in the front vs back usb ports.
Also I am not against getting a nice dock for it while its here at work but I like to keep it in landscape mode. If anyone knows of one available to keep it on with a clock or something and still eb able to charge it I would be appreciative.
Thanks in advance.
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Click to collapse
Ok so this is my understanding. If it's a laptop they usually only have one usb port inside. its then run to a hub and from there split to all the other laptop usb ports that you see on the outside. so the power is usually lower than the 500ma. I thought the cable from cableforge.com was bad but it was just the low power from the laptop port.
This said USB 3.0 runs on its own line so it usually works better. now this is where i may be wrong isnt the usb 3.0 more than 500ma?

Excelus said:
The iPhone charges "more" than the Note 2 because the iPhone's battery has a smaller capacity. (1440 mAh vs 3100 mAh) so basically every 1% of battery on the Note 2 is over 2% on the iPhone.
A
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The iphone and most other phones charge "more" because they pulls the entire 500mA that the usb spec allows. For some reason, Samsung phones only pull 96mA over usb. A new cable won't make a difference.