Database Develop

Charging tab in the car

I have a question for the xda community hopefully you guys can help me out: ok so i have been charging my tab in my car using both the cigarete lighter and ac outlet, but i have noticed that it discharges faster than it charges, for example if i am using the gps while charging the tab the tabs battery will drain. On the other hand if i am charging the tab at home on a regular wall outlet it charges fine. In comparison my samsung galaxy s charges fine in the car via the cigarete lighter. I am using the original charger that came with the tab. Any ideas as to why it drains faster than it charges? Thanks.
Sent from my GT-P1000 using XDA App

The Galaxy Tab USB port is wired slightly differently to other USB ports, which results in only getting a trickle-charge from regular USB cables. You need something like this...
http://cgi.ebay.in/USB-car-wall-charger-adapter-plug-Samsung-Galaxy-TAB-/190522553195
I can't vouch for that particular seller, but I have one of those adaptors and it makes all the difference when plugging into anything USB.
Incidentally, when you say you're using the charger that came with the tablet, are you saying that it came with a car charger? I've not heard of that before.

Check the output of the charger. It should put out 2000mA. It should be written somewhere on the charger.

johncmolyneux said:
The Galaxy Tab USB port is wired slightly differently to other USB ports, which results in only getting a trickle-charge from regular USB cables. You need something like this...
http://cgi.ebay.in/USB-car-wall-charger-adapter-plug-Samsung-Galaxy-TAB-/190522553195
I can't vouch for that particular seller, but I have one of those adaptors and it makes all the difference when plugging into anything USB.
Incidentally, when you say you're using the charger that came with the tablet, are you saying that it came with a car charger? I've not heard of that before.
Click to expand...
Click to collapse
What I meant was that I am using both the cable and adapter that came with the tab on the car ac outlet
Sent from my SGH-T959 using XDA App

@johncmolyneux
I had read that the port was wired differently. Thanks for the link into ebay for the charger adapter. For the price, it's worth checking out.

I guess I can give it a try
Sent from my SGH-T959 using XDA App

Is my charger junk?

I brought my 7 home Saturday at 33% charge, plopped down on the couch, plugged it in and started playing. The battery level slowly dropped. The charger WILL charge it, but only when it's idle and it seems slow as hell. I figured a 2A charger would have my Razr Maxx full in no time but in an hour it went from 40% to 50%. After completely draining my Nexus 7 I plugged it in and charged it at idle for 12 hours. When I looked this morning it was at 67%.
I'm assuming the charger is bad. I also have a different cable plugged in to it which I suppose I should try replacing first. But if this thing actually charges that slow I'd rather find out now than keep searching for a problem that doesn't exist.

Is it possible that your cable is an older one and can't handle the higher electric current? I read that this happened to people who used older cable to charge the Retina iPad as well. Don't know whether this is the reason.

The cable is one I got on ebay for $1. Entirely possible that's the problem. I'll try the OE cable tonight.

You should always use what the device shipped with. More than likely, that's the problem.
Sent from my Galaxy Nexus using xda app-developers app

Well, I can't very well "use" a 3' usb cable. I hope you don't think you should buy $100 hdmi cables, too.

Nope, but most devices don't ship with HDMI cables. I've bought cheap cables online, but if my phone or tablet came with one I surely use it.
I've heard and seen people messing up their devices or having weird problems (like yours) from using a different cable and/or charger plug. So I always use what it came with. So many little nuances .
Sent from my Galaxy Nexus using xda app-developers app

I definitely need a longer cable. Guess I'll just have to pony up for quality cables instead of these ones that ship from China.

qoncept said:
I definitely need a longer cable. Guess I'll just have to pony up for quality cables instead of these ones that ship from China.
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Click to collapse
Non-sense. Go to monoprice.com and you can get plenty of dirt-cheap cables that get the job done just fine. It sounds like you're currently using a 2-pin micro-USB instead of a 4-pin. The extra 2 pins are for data, as well as high-power charging for devices that pull more than USB's standard 500mA.

nickmv said:
Non-sense. Go to monoprice.com and you can get plenty of dirt-cheap cables that get the job done just fine. It sounds like you're currently using a 2-pin micro-USB instead of a 4-pin. The extra 2 pins are for data, as well as high-power charging for devices that pull more than USB's standard 500mA.
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Click to collapse
Doh.. I'll start by pulling out the multimeter when I get home. Or maybe just looking before I even bother with that.

[Q] Charger

Can someone tell me if the Htc One charger is the same as the One S please.

Most chargers nowadays unless an iDevice are the same 5v micro usb
Sent from my HTC One using xda premium

Thanks, just making sure. Replacing chargers and car chargers and HDMI adaptors is almost as expensive as the phone itself. :laugh:

born_fisherman said:
Most chargers nowadays unless an iDevice are the same 5v micro usb
Sent from my HTC One using xda premium
Click to expand...
Click to collapse
Careful. HTC does something funky with the wiring in their chargers and phones such that, when using a non HTC charger, the phone will only charge at 0.5 amp, vs 1 amp with an HTC charger. Net result is that your phone will take twice as long to charge with a non HTC charger. There are several threads on this subject, and I've observed it first hand on my One. The non HTC charger shouldn't hurt your phone though, only your patience...
Sent from my HTCONE using xda app-developers app

I've never had an issue.. have had HTC for years now and have gone thru several chargers bought from walgreens and they all seem to work fine. I usually charge overnight anyway so I never time the charge lengths. Ymmv I guess?
Sent from my HTC One using xda premium

I usually charge overnight as well. But I travel a lot, and when I do the GPS - a battery burner - gets a lot of use. What got me started exploring this, was when I saw my HTC ONE battery going in the wrong direction (slowly) while charging in the car while using the GPS. This led me to learning more than I ever wanted to know about HTC chargers and their funky wiring ... Apparently you can get around this by shorting two wires in the USB cable, but I have no intention of trying that!
Sent from my HTCONE using xda app-developers app

levman said:
I usually charge overnight as well. But I travel a lot, and when I do the GPS - a battery burner - gets a lot of use. What got me started exploring this, was when I saw my HTC ONE battery going in the wrong direction (slowly) while charging in the car while using the GPS. This led me to learning more than I ever wanted to know about HTC chargers and their funky wiring ... Apparently you can get around this by shorting two wires in the USB cable, but I have no intention of trying that!
Sent from my HTCONE using xda app-developers app
Click to expand...
Click to collapse
Ok I guess I can see that when using a high energy use app like navigation
Sent from my HTC One using xda premium

levman said:
Careful. HTC does something funky with the wiring in their chargers and phones such that, when using a non HTC charger, the phone will only charge at 0.5 amp, vs 1 amp with an HTC charger. Net result is that your phone will take twice as long to charge with a non HTC charger. There are several threads on this subject, and I've observed it first hand on my One. The non HTC charger shouldn't hurt your phone though, only your patience...
Sent from my HTCONE using xda app-developers app
Click to expand...
Click to collapse
I don't think the problem is at HTC but the charger you might have. I have successfully charge @ ~800mA (1000mA = 1 Amp)with different chargers ( Asus charger, Samsung charger and a newer palm charger). My new blackberry charger can charge @ ~600mA.
If I use my older palm charger, my Nokia charger, my old blackberry or a dollar store charger, it will only charge @ ~3xxmA.
If you read the spec carefully, you will see most newer *smartphone* charger max @ 1A, and older charger max @ 500mA. (or my BB charger max @ 800mA. )
So it's OK to use non HTC charger, just be sure to read the spec and find one charger =>1A.
Hope this help.

I'm on the lookout for a car charger someone can confirm will charge the One at full 1A speeds. I don't mean one where it claims to on amazon's site, but that you've actually witnessed it. Thanks for any help!

QuantifyThis said:
I'm on the lookout for a car charger someone can confirm will charge the One at full 1A speeds. I don't mean one where it claims to on amazon's site, but that you've actually witnessed it. Thanks for any help!
Click to expand...
Click to collapse
Yeah, I can't find anything on eBay or Amazon meet their description. The one works good for me is a Verizon Charger but it cost 35 usd...
Sent from my HTC One using xda app-developers app

levman said:
I usually charge overnight as well. But I travel a lot, and when I do the GPS - a battery burner - gets a lot of use. What got me started exploring this, was when I saw my HTC ONE battery going in the wrong direction (slowly) while charging in the car while using the GPS. This led me to learning more than I ever wanted to know about HTC chargers and their funky wiring ... Apparently you can get around this by shorting two wires in the USB cable, but I have no intention of trying that!
Sent from my HTCONE using xda app-developers app
Click to expand...
Click to collapse
That is correct, usb specification is 5v, with 500mA (0.5A) maximum, hence the modified cable you refer to. The simplest way if you don't wish to modify cables is to buy HTC car charger
http://www.htcaccessorystore.com/uk/p_htc_item.aspx?i=246652&phone=246667
Which will charge at up to 1A with any HTC phone
Sent from my HTC One using xda app-developers app

You can find HTC chargers on amazon that will give you the full 1 amp. Look for older phone models like treo pro or mytouch 4g and they'll be cheaper but work fine.
QuantifyThis said:
I'm on the lookout for a car charger someone can confirm will charge the One at full 1A speeds. I don't mean one where it claims to on amazon's site, but that you've actually witnessed it. Thanks for any help!
Click to expand...
Click to collapse
Sent from my HTC One using xda app-developers app

What happens if I charge the phone with a 2am charger? Does it damage my battery? Will it charge faster?

ksarius said:
What happens if I charge the phone with a 2am charger? Does it damage my battery? Will it charge faster?
Click to expand...
Click to collapse
The charger *should* only provide 2A if the device (phone) request it.

Just thought I would chime in on some observations here. Long story short, when I bought my HTC One, I left the charger in the box and continued to use my multi-port USB charger with 3x1A ports and 1x2.1A port.
When connected to the 1A port, I found it quite strange that my phone was taking 4 hours or longer to fully charge. Also observed the same thing when connected to the 2.1A port. I was thinking that something was up with my phone somehow limiting the maximum charge current.
Anyway, I read a suggestion to use SystemPanel Lite to check for USB or AC power connected and sure enough it was reporting USB power. I remember the case with my Xperia X10 where you have to short out the two middle (data) pins on the cable or in the charger so that the phone detects that it is being connected to an actual charger. I tested it with my old Xperia charger, another generic USB charger, and the HTC charger and managed to get SystemPanel Lite to report it as AC connected.
But here is the interesting part. I have a car charger rated for 1A. Initially it never worked with the Xperia X10 until I opened it up and shorted out the two data pins. It has worked ever since. However, when I connect this to my HTC One, it still reports it as USB connected.
This has got me thinking that there maybe something more than just shorting out the two data pins for the HTC One to detect that an actual charger is connected. Just some food for thought.

Don't tell me HTC pulled an Apple and we have to buy only HTC chargers to get full speed charging? Does anyone have a confirmed non-HTC car charger that reports "AC" charging in SystemPanel Lite?

QuantifyThis said:
Don't tell me HTC pulled an Apple and we have to buy only HTC chargers to get full speed charging? Does anyone have a confirmed non-HTC car charger that reports "AC" charging in SystemPanel Lite?
Click to expand...
Click to collapse
As per my post, I tested a generic USB 1A charger (it's at home, but it was one that was supplied with a Netcomm MyZone) and with my stock Sony Ericsson USB 700mA charger, both of which reported as AC connected. There has to be another way that these can be detected as chargers other than a simple short of the data pins.
Tested not to work so far has been an iPhone charger, Amacrox AX025-TACH1, Philips Power Bug, and two generic USB car chargers both with the data pins open then shorted.

Non HTC charger plugged into wall reports ac power. Proof
Sent from my HTC One using xda premium

Are either of those car chargers?

QuantifyThis said:
Are either of those car chargers?
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Click to collapse
Good point. My apologies. The work "car" managed to be skipped as I read it.

[Q] Nexus 7 alternate charger

I am looking for NEXUS 7 alternate charger which can charge at the same speed the Original Nexus 7 charger charges
unfortunately my nexus 7 original charger has been Burnt Becoz of Charging on UPS Inverter
and i cannot find the Geniune charger Locally
so is there any possiblity i can charge my NEXUS 7 to any other CELLPHONE charger which can charge it to the Same Speed what original does
i bought IPAD3 Charger and that one is charging too much slow need solution

pleasant said:
I am looking for NEXUS 7 alternate charger which can charge at the same speed the Original Nexus 7 charger charges
unfortunately my nexus 7 original charger has been Burnt Becoz of Charging on UPS Inverter
and i cannot find the Geniune charger Locally
so is there any possiblity i can charge my NEXUS 7 to any other CELLPHONE charger which can charge it to the Same Speed what original does
i bought IPAD3 Charger and that one is charging too much slow need solution
Click to expand...
Click to collapse
That's because the iPad charger doesn't have the data pins shorted out to enable fastcharge . Easiest way to accomplish fastcharge with your charger, is to buy a charging cable (data pins shorted out, so it is not a data cable:
http://dx.com/p/usb-male-to-lengthe...for-samsung-i9500-9300-htc-white-100cm-207353
It even has the lengthened micro usb connector the Nexus 7 needs.
Or maybe better, buy this one, found in another thread here on XDA, this one is confirmed to work in fastcharge mode with any usb charger:
http://www.monoprice.com/products/p...=10303&cs_id=1030307&p_id=5457&seq=1&format=2
Good luck!
Sent from my Nexus 7 using xda app-developers app

rkuijpers said:
That's because the iPad charger doesn't have the data pins shorted out to enable fastcharge . Easiest way to accomplish fastcharge with your charger, is to buy a charging cable (data pins shorted out, so it is not a data cable:
http://dx.com/p/usb-male-to-lengthe...for-samsung-i9500-9300-htc-white-100cm-207353
It even has the lengthened micro usb connector the Nexus 7 needs.
Or maybe better, buy this one, found in another thread here on XDA, this one is confirmed to work in fastcharge mode with any usb charger:
http://www.monoprice.com/products/p...=10303&cs_id=1030307&p_id=5457&seq=1&format=2
Good luck!
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
I am using the same cable that came with nexus 7 original charger only adaptor is being used of ipad

I use the blackberry playbook charger with no issues.
Much longer cable also.

pleasant said:
I am using the same cable that came with nexus 7 original charger only adaptor is being used of ipad
Click to expand...
Click to collapse
Yes I know, and that's the reason the iPad charger won't work on fastcharge.
You need to either shortout the data pins of the iPad charger, or use a charger cable with shorted data pins ( a so called charge-only micro usb cable) to make the iPad charger use full capacity (fastcharge mode). There are also cable adaptors for sale that will shortout the data pins for you.
Cryingmoose said:
I use the blackberry playbook charger with no issues.
Much longer cable also.
Click to expand...
Click to collapse
Yep, that one works because it follows the USB standard rules, and not the Apple USB standard.
No iDevice (iPhone/iPad) charger will fastcharge an android phone or tablet without modifying the datapins or use a charge-only cable / adaptor.
The Blackberry Playbook charger is known to work

Get an HP touchpad charger if you can. I can provide empirical evidence that it will actually charge your n7 20 minutes faster than the stock charger. I posted a thread about it here some time ago. "Best aftermarket charger ..." Or something like that.
Plus, my HP touchpad charger hasn't failed to work with whatever device I've plugged into it - idevice or android.
Sent from my Galaxy Nexus using xda app-developers app

vote for HP touchpad charger
pleasant said:
I am looking for NEXUS 7 alternate charger which can charge at the same speed the Original Nexus 7 charger charges
unfortunately my nexus 7 original charger has been Burnt Becoz of Charging on UPS Inverter
and i cannot find the Geniune charger Locally
so is there any possiblity i can charge my NEXUS 7 to any other CELLPHONE charger which can charge it to the Same Speed what original does
i bought IPAD3 Charger and that one is charging too much slow need solution
Click to expand...
Click to collapse
I will suggest the HP touchpad charger for use with the N7... they work great and produce no noticeable heat when not connected... shows good efficiency.:good:
Check Ebay -= just did a quick search and got 131 hits anywhere from 8-20 USD. I"ve bought 2... one is firmly set to be my preferred travel charger for any USB device.

+1 Re: HP Touchpad charger
Someone did a in depth look at factory and aftermarket chargers and it came out way better in terms of current provided and cleanliness of power without spikes or dropouts.
Sent from my Nexus 7 using Xparent Purple Tapatalk 2

http://forum.xda-developers.com/showthread.php?t=2245915

zuberio said:
Get an HP touchpad charger if you can. I can provide empirical evidence that it will actually charge your n7 20 minutes faster than the stock charger. I posted a thread about it here some time ago. "Best aftermarket charger ..." Or something like that.
Plus, my HP touchpad charger hasn't failed to work with whatever device I've plugged into it - idevice or android.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Do I still need a aftermarket cable w/ the data pins shorted out? Or will this all in one package: http://www.ebay.com/itm/Genuine-HP-North-American-Power-Charger-FB341AA-AB-for-TouchPad-Cable-/251250614212?ssPageName=STRK:MESE:IT Do the trick?

magicdot said:
Do I still need a aftermarket cable w/ the data pins shorted out? Or will this all in one package: http://www.ebay.com/itm/Genuine-HP-North-American-Power-Charger-FB341AA-AB-for-TouchPad-Cable-/251250614212?ssPageName=STRK:MESE:IT Do the trick?
Click to expand...
Click to collapse
That will do the trick - but you don't need another cable if you already have one.

I went with the charger without cable option and got 2 chargers for less than that price. Just have eBay sort the search results by price+shipping and optionally USA sellers only to find a better price without waiting for a slow boat from China.
Sent from my Nexus 7 using Xparent Purple Tapatalk 2

containing ndoxima
bsoplinger said:
I went with the charger without cable option and got 2 chargers for less than that price. Just have eBay sort the search results by price+shipping and optionally USA sellers only to find a better price without waiting for a slow boat from China.
Sent from my Nexus 7 using Xparent Purple Tapatalk 2
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Click to collapse
Will using chargers not putting out the proper amperage cause any hard ware issues? Just curious.
Thanks

bidzer said:
Will using chargers not putting out the proper amperage cause any hard ware issues?
Click to expand...
Click to collapse
If the charger puts out less than the tablet needs then it will just charge slower (or not at all if it's really low) and if it puts out more than the maximum the tablet uses the extra will just go unused. Voltage is a different issue.
Sent from my Nexus 7 using Xparent Purple Tapatalk 2

bidzer said:
Will using chargers not putting out the proper amperage cause any hard ware issues? Just curious.
Thanks
Click to expand...
Click to collapse
Having your device plugged into a USB 2 500mA computer port obviously charges slower then a 2000mA wall charger. It would be pretty faulty design if plugging your device into your computer would cause hardware damage.

Man, this really sucks, the Monoprice cable mentioned earlier in this thread is having the same issue I had with another micro USB cable, it doesn't seem to fit into the Nexus 7 snugly, it doesn't seem to go in all the way. (I hope I don't have a busted charging port), It doesn't seem to charge it at all, even with the stock Nexus AC adapter. I'm about to break down and buy the official Google charger again, even if all I need is a new micro USB cable.

I'm using 2 different monoprice cables, one in my car and one at home, and both fit well. Sounds like the port has gotten damaged.
Sent from my Nexus 7 using Xparent Purple Tapatalk 2

So, I just decided to buy a whole new charger off Amazon. If that won't work and I determine that the micro USB port is busted, I'm not going to be very happy, haha. does anyone know if Google repairs them for a fee?

I use a Playstation Vita charger which seems to charge my N7 very fast. On the other hand, I've tried an old mobile charger also and the battery level goes down whilst plugged into it.

If under warranty and purchased from the PlayStore, yes, otherwise, if under warranty, ASUS.

[Q] Battery drain while connected to car charger

Using CM10.1 (06-14 nightly) on my One (International), connected to a Belkin 1A USB car charger with a decent quality USB cable. The phone discharges slowly in general use, and quickly when using GPS. Looking in battery settings it shows "Charging (AC)", which would suggest that it's drawing the full 1A for charging. I didn't notice this problem on stock Sense, although it's been a while since I used that.
Has anybody else seen anything similar on their One? Is there any useful information I could get from a logcat to give to the CM devs?
Thanks in advance,
Jon

OK I checked on stock and it does drain similarly. Should I just get a more powerful charger or could I have a hardware problem? Tried with 2 different 1A car adaptors.
Sent from my One using xda premium

Have you got a clamp meter or know someone who has one? That will tell you how many amps are going into your phone. It does sound like the charger though as your charger at home should be similar voltage/amps to the car charger only the AC charger needs a transformer and rectifier to step down the voltage and change it from AC to DC, car chargers just step down the voltage a little (12v-5v) so require little additional size. Probably easiest to swap out the charger, they're pretty cheap
Sent from my One using xda premium
Sent from my One using xda premium

I think you need a bigger charging maybe the charger is not able to provide the needed ampere.
Sent from my HTC One using xda app-developers app

Thanks guys. I've ordered a 3.6A charger which had reviews saying it worked well for high power usage Android devices. So hopefully that'll sort things out. I'll post back my results.

OK, tried with the new charger and a good USB cable, and all is well. Even with GPS and Spotify running together the phone still charges slowly.

jondrums said:
OK, tried with the new charger and a good USB cable, and all is well. Even with GPS and Spotify running together the phone still charges slowly.
Click to expand...
Click to collapse
It's probably not about the Amp rating of the charger. You probably had a cheap charger unit that couldn't deliver the amperage the phone needed either cos it was using cheap parts or something. A proper 1amp charger will still do as well as your new 3.6A charger

ArmedandDangerous said:
It's probably not about the Amp rating of the charger. You probably had a cheap charger unit that couldn't deliver the amperage the phone needed either cos it was using cheap parts or something. A proper 1amp charger will still do as well as your new 3.6A charger
Click to expand...
Click to collapse
Yeah that makes sense. I just thought that if I got a massively over-specced charger then it would at least manage 1A Would have expected the Belkin one to work properly in the first place but never mind.