Database Users

Compatible chargers

Anyone else have any experiences they'd like to share using non-OEM chargers?
I use my HP TouchPad charger in my living room, as my HP Touchstone plugs into it usually. It charges the N7 at exactly the same rate as the OEM charger.
Just curious about others' experiences.
Oh....and is anyone else w/the HP TouchPad just completely spoiled regarding tablet prices? $250 seemed like a lot of money to pay, LOL.

http://saraoutlet.com/yxt-023-us-2-...for-apple-ipad-iphone-4g-3gs-white-35561.html
I use this, it charges my iphone, ipad, ipod touch, samsung, and now my nexus. I have one for the car as well that is 1A/2.1A.

the blackberry playbook 1.8a charger works really well. indistinguishable from the supplied OEM. available for $16 bucks or so in retail packaging.

I've used the same charger for my Galaxy SII. Seemed to do the job well and just as quickly!

I have a few blackberry chargers one is a playbook one and some other android chargers.. they all work just fine.

I'd love to know if there are any portable chargers that will charge the Nexus 7 without being plugged into the wall, so, I can charge it when I'm laying in bed or something, I have portable USB chargers that I don't thing would work with the 7 The Duracell Powerhouse USB charger and the Sony Media CP-ELS USB Portable Charger with 2,000 mAh Li-Ion Battery, I use them interchangeably with my iPhone 4S and Playstation Vita.

Okay, I went through my "wall wart" drawer and tried 8 chargers and 9 cables. I can't find any pattern to the results
There was one cable (skinny black generic USB) that didn't work with charger, and one charger (from a Kingston Wi-Drive) that wouldn't work with any cable.
The best cable was a white mini-usb (that I used with a mini-micro dongle) that had come with my generic 5000 mAH backup battery; it worked with *everything* except the Wi-Drive charger. The best chargers were the OEM ASUS charger, and a generic small black cube (1A) labelled "KIN"; those worked with every cable except the skinny black dud.
The worst of the working chargers were an "Innergie" dual laptop/USB power supply, and the generic battery backup. Those only worked with that white cable.
Honorable mentions go to an old Motorola RAZR charger (used with a mini-micro dongle) and a small Samsung phone charger. Those have permanent cables, and both worked.
I couldn't pick up any pattern in terms of amp rating (obviously, the lower amp chargers will take longer). It seems to be "luck of the draw".

I've tried probably 4-5 different chargers including a Motorola wall charger plugged in the wall, and also plugged into a power inverter in my truck, a motorola car charger and an oem wall charger and have no issues with any of them.

iPad 3 charger compatibility
Can anyone confirm if N7 charges using the new iPad 10W charger? Mine only supports the charger that came with it. Does that mean that the usb port is broken and I need to replace it or is it the way all the units behave?

Other XDA threads with similar topic:
http://forum.xda-developers.com/showthread.php?t=1780211
http://forum.xda-developers.com/showthread.php?t=1781680
http://forum.xda-developers.com/showthread.php?t=1784322

dmalovic said:
Can anyone confirm if N7 charges using the new iPad 10W charger? Mine only supports the charger that came with it. Does that mean that the usb port is broken and I need to replace it or is it the way all the units behave?
Click to expand...
Click to collapse
It charges using my iPad2 charger, which I think is the same charger as the new iPad?

The Nexus 7 does not show charging when plugged into any of my OEM/aftermarket Apple chargers.
It does not appear to matter whether I use the USB cable supplied by Asus, or a standard commodity micro USB cable.
There is evidence from other users that the tablet may be charging at the 1A rate even though the charge indicator stays off.
I have not personally confirmed this yet.

Im using the charger of my BlackBerry playbook! 5volts 2amp!
From 0% to 100% in less than 3 hours!
Sent from my Nexus 7

I bought 10 of the HP Touchpad chargers for $5 shipped a few weeks ago. They work perfect for the Nexus 7, same plug, 2AH charging..
I think you can still find them for $5 shipped @ hp.com

All my micro USB chargers work , from Nokia to BlackBerry to HTC all fab all charge the n7 OK
Sent from my Nexus 7 using xda premium

martyg7 said:
The Nexus 7 does not show charging when plugged into any of my OEM/aftermarket Apple chargers.
It does not appear to matter whether I use the USB cable supplied by Asus, or a standard commodity micro USB cable.
There is evidence from other users that the tablet may be charging at the 1A rate even though the charge indicator stays off.
I have not personally confirmed this yet.
Click to expand...
Click to collapse
I've had one of those OEM/aftermarket Apple charges blow up on me (not shrapnel, it stayed in the plastic casing), so I wouldn't expect much from those anyway. Have you tried with any standard micro USB phone charger?

Chargers that work:
- Motorola Droid Pro (hard-wired micro USB). Rated at 800 mA but seems to charge almost as fast as the OEM.
- Kin One (Uses any USB cable). Rated at 1A, works with every USB cable I have (almost; there were a couple that didn't work with anything). These are available on-line for less than 10 bucks:
http://www.amazon.com/Sharp-Standard-Wall-Charger-CNR1002/dp/B005IY428Y
http://www.aftermarketcellular.com/ic/CNR1002.html
This is nice and compact; I'm going to order a couple of more to have as spares.
- Motoroloa RAZR (hard-wired mini-USB, used with mini-to-micro adapter). Rated at 500 mA. Works, but probably pretty slow.
- Samsung (from unknown phone; hard-wired micro-USB) rated at 750 mA. Didn't test charge time.
As an aside, I have a 5000 mAh backup battery that I've used with phones and my Nook color (http://www.amazon.com/5000mAh-External-Motorola-Blackberry-Nintendo/dp/B004P8E612). It works with the Nexus, but ONLY with the mini-USB cable that the Power Bank shipped with. Every other cable I've tried chokes. It's intended for an iPhone and puts 6.5V across the power pins (with no load; this is about the same as the Kin) and pulls the data pins to 3.4V. What's weird is that I can connect a 2-conductor (charge only) extension in series with the working cable, so that the data signal never reaches the Nexus. If I use a 2-conductor cable by itself, the Nexus doesn't charge.

tjupille said:
Chargers that work:
Click to expand...
Click to collapse
When you say they work, are they showing as AC charging when you use them or are they just charging.
Go-to battery stats and it will say either
Charging (USB)
Or
Charging (AC)
Sent from my Nexus 7

Compatable car charger
It's really disappointing to know N7 is so picky about chargers. Can anyone report on a working small/short car USB charger that is compatible?

You might want to check that your vehicle can provide 2amps from its cigarette lighter plug. Normal only utility plugs can do that.
Sent from my Nexus 7

Extended USB Cable not charging nexus 7

I tried swapping out the USB cable that came with my nexus 7 with a longer usb cable (still using the same charger though edit: by that, i mean the ASUS charger that came with the N7). It doesn't seem to be charging though, even though it says 'charging' on the screen. When i was using the nexus 7 while plugged in, i actually lost 1% charge after using it for like 30 or so minutes.
I think i grabbed this cable off Ebay. It had no trouble charging my phone. Are there different grades of USB cables or something?

By same charger do you mean the one it came with? The 2 amps charger. Sorry I had to clear that bit up. I think longer cables creates more resistence but I'm not sure if the cable length is significant enough stop charging. I have no idea about grades of USB cables though maybe someone can elaborate on that.

Summerfly said:
By same charger do you mean the one it came with? The 2 amps charger. Sorry I had to clear that bit up. I think longer cables creates more resistence but I'm not sure if the cable length is significant enough stop charging. I have no idea about grades of USB cables though maybe someone can elaborate on that.
Click to expand...
Click to collapse
Yes, the ASUS charger it came with, i plugged in the 6 foot microusb cable i bought off ebay into it.

MFister said:
Yes, the ASUS charger it came with, i plugged in the 6 foot microusb cable i bought off ebay into it.
Click to expand...
Click to collapse
Okay, 6 foot cable doesn't sound excessively long. I have to ask what were you doing on it while charging and what brightness setting was the screen at. Maybe you were draining more power than the charger can provide?

This is pretty common. The stock cable has larger conductors, as I assume other 2 amp chargers come with, and standard cables are sensed somehow and charging current is limited. Try finding a 22awg cable, I think it will work.

I use a USB extender since I don't have any outlets near my bed. I use a cable rated for USB 2.0 and haven't had any problems. I have had problems with cables that aren't. The Motorola USB cables are rated for 2.0 and they all work fine for me with no problems.

burpootus said:
This is pretty common. The stock cable has larger conductors, as I assume other 2 amp chargers come with, and standard cables are sensed somehow and charging current is limited. Try finding a 22awg cable, I think it will work.
Click to expand...
Click to collapse
Thanks, i assume this cable that's 28/24 awg would work?
http://www.monoprice.com/products/p...=10303&cs_id=1030307&p_id=8643&seq=1&format=2

I use a cable extender, but I insert the original stock cable into the tablet (not the charger). It appears to recognise that and charge at the correct rate.

I've tried using a usb extender to charge with the asus charger and the Asus USB cable and checking with battery graph it charges much slower compared to using just the Asus cable.

People with eyesight better than mine will see that the micro USB socket has 5 pins and the Nexus looks at the 5th pin to decide what is connected and what the connected device is allowed to do. The pin can be grounded, not connected (floating) or can be connected to ground via I think 3 fixed resistances. Google for USB on the go. I think that is the standard adopted by Asus and the cable doesn't comply.

I'm using a nook 1/2 cable I got with a car charger for the nooktablet
It works and is longer then the stock cable it came with.
Sent from my Nexus 7 using Tapatalk 2

EE here. I just ran into this issue recently, so I'll share what I learned. Grab a multimeter and measure the resistance of the cable. Check all 4 pins just in case one of them is worse than another.
In my case, I had a really horrible USB extension cable. It measured about 4 Ohms. 4 Ohms is low enough for a multimeter to pass a continuity test, but do out the math:
V = I * R
V = 2A * 8 Ohms (4 Ohms on VCC, 4 Ohms back on GND)
V = 16V.
16 volts?? Where does 16V come from? Short answer: It doesn't. If 2A were actually flowing, the USB cable would have a 16V drop across it. It doesn't though, which tells us that 2A is not flowing. 1A is also not flowing, since that would still be 8V.
0.5 Ohms is a good estimate for a MAXIMUM resistance for a USB charging cable. That's a 1V drop at 2A, meaning the phone is only getting ~4V. That explains why the USB cable that comes with the Nexus 7 is so darn short - it comes in at around 0.1 Ohms (or perhaps less, that's about the limit of what I can accurately measure)

Wanted to get a longer USB cable that will work the Asus adapter, any links?
Thanks.

came across this thread while investigating a strange thing in charging my 4400mah extended battery of my s3.
I have a 5v 1A stock samsung charger with an extension cable i was always using to charge my old phones with a less capacity battery (mugen 3200mah)
This night i spent i wasnt ble to get a full charge from 5% to 100% in 8 hours and this sounds more than strange, but yet understandable.
i will try timings with the stock cable without extension and i'll come back...

Charging Problem?

Is anyone else having any trouble with charging the phone? I was watching a movie on the phone and noticed the battery was getting low so I plugged in the charger and it didn't charge. The phone was pretty hot and after I let it cool off the phone kinda started to charge, it took another few minutes before it finally started to charge.

No issues here. Are you using the stock charger?
Sent from my Nexus 4 using xda premium

Aftermarket. This is the first time it's happened. Guessing it might have to do with the phone/battery getting hot.

I was using an Amazon charger I used for my old phone and wondered why it took so long to charge. That charger only provides 0.8 amps for 5V vs. 1.2 amps for the stock charger. When using the stock charger, it should only take ~3 hours to charge fully according to several reviews. I noticed that the phone charged MUCH faster with the stock charger.

Guys, use the stock charger. It's 1.2 amps and the booklet specifically states to use this charger.

jasonwc said:
I was using an Amazon charger I used for my old phone and wondered why it took so long to charge. That charger only provides 0.8 amps for 5V vs. 1.2 amps for the stock charger. When using the stock charger, it should only take ~3 hours to charge fully according to several reviews. I noticed that the phone charged MUCH faster with the stock charger.
Click to expand...
Click to collapse
Does it matter if I just use a micro usb(ASUS or HTC) and plug it to a computer?

ysihaoy said:
Does it matter if I just use a micro usb(ASUS or HTC) and plug it to a computer?
Click to expand...
Click to collapse
A computer USB port will generally put out 500 mA. If it works, it will be slower and probably not charge fully. A powered USB hub might put out more amps, but check the sticker on the hub to be sure.

I experienced this today. I ran a dashcam app while it was plugged in on my dash. When the phone got too hot it still detected as plugged in, but did not charge. Its a safety thing. I've had 2 or 3 batteries swell up from heat. And since this one is not removable... That'd be bad.
As far as the amperage goes: I'm pretty sure the phone is going to pull what it will. So if your charger is rated 500mA, still going to draw 1200mA or whatever its rated to pull. So the el cheapo charger will get hot, buzz, and/or break.
Now if you want to use your el cheapo charger, make sure the data wires in the port are disconnected. That'll make it draw less power because the phone will think its a USB port.
Sent from my Nexus 4 using Tapatalk 2

How long til the phone charges up again?
ackliph said:
I experienced this today. I ran a dashcam app while it was plugged in on my dash. When the phone got too hot it still detected as plugged in, but did not charge. Its a safety thing. I've had 2 or 3 batteries swell up from heat. And since this one is not removable... That'd be bad.
As far as the amperage goes: I'm pretty sure the phone is going to pull what it will. So if your charger is rated 500mA, still going to draw 1200mA or whatever its rated to pull. So the el cheapo charger will get hot, buzz, and/or break.
Now if you want to use your el cheapo charger, make sure the data wires in the port are disconnected. That'll make it draw less power because the phone will think its a USB port.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse

Along the same lines, the Nokia Lumia charging plate doesn't work (even though its a QI wireless charging plate). Cuts in and out and sometimes stops all together.

egon27 said:
Aftermarket. This is the first time it's happened. Guessing it might have to do with the phone/battery getting hot.
Click to expand...
Click to collapse
That's the problem. Check the output. Stock one pumps out 1.2A. Most aftermarket only do 500mA.
Sent from my Nexus 4 using XDA Premium HD app
---------- Post added at 11:42 PM ---------- Previous post was at 11:41 PM ----------
ackliph said:
I experienced this today. I ran a dashcam app while it was plugged in on my dash. When the phone got too hot it still detected as plugged in, but did not charge. Its a safety thing. I've had 2 or 3 batteries swell up from heat. And since this one is not removable... That'd be bad.
As far as the amperage goes: I'm pretty sure the phone is going to pull what it will. So if your charger is rated 500mA, still going to draw 1200mA or whatever its rated to pull. So the el cheapo charger will get hot, buzz, and/or break.
Now if you want to use your el cheapo charger, make sure the data wires in the port are disconnected. That'll make it draw less power because the phone will think its a USB port.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
If the charger is rated 500mA it is 500mA. There is no way the phone can actually pull more than that.
Sent from my Nexus 4 using XDA Premium HD app

richteralan said:
That's the problem. Check the output. Stock one pumps out 1.2A. Most aftermarket only do 500mA.
Sent from my Nexus 4 using XDA Premium HD app
---------- Post added at 11:42 PM ---------- Previous post was at 11:41 PM ----------
If the charger is rated 500mA it is 500mA. There is no way the phone can actually pull more than that.
Sent from my Nexus 4 using XDA Premium HD app
Click to expand...
Click to collapse
That's the thing. It will pull it, but when it does, it'll just start to overheat the charger. The charger supplies a constant voltage. The phone can vary it's resistance based on if it detects a USB connection (data wires open), or a dedicated charger (data wires closed). Say the charger outputs 5V. The phone is dumb and just looks at the data wires (open/closed). For open it'll run at 10Ohms giving you 500mA. For closed it'll give you 5Ohms giving you 1A.
Put your multimiter on Amps and try connecting it to a wall-wart rated at 500mA. I bet you it will read much much more than 500mA on your multimeter. Might even break the wall-wart or the multimeter if you hold it there long. That's because amperage is based on the resistance! Which comes from the phone. And it'd be impractical to put an ammeter into the phone just to protect your el cheapo charger. lol That's why they just use the open/closed data wire method and expect you to not cheap out on the charger.
Now I will admit some el cheapo chargers may not be able to go over their amperage rating, but the phone will still try to pull more if the data wires are closed thus causing your phone not to charge all the way, or at all.
Bottom line. If you're using an el cheapo charger, make sure it's rated higher than 1.2A or it'll get hot and/or break.

[Q] Nexus7 charger with other devices?

I just got a Nexus 7 a couple of days ago and of course I thought any USB charger would work. When it didn't charge on the charger I keep plugged in for all purpose charging, I resorted to Google to see what's up. I would love to have a single charger that works for everything. Having looked through many pages of discussion about this I did not see the answer to my question, whether the Nexus 7 charger will charge my other devices, phone, ASUS Transformer, etc, I know that the data pins on this charger are shorted, but does that prevent it from properly charging my phone, for example? Do the data pins being shorted affect it's ability as a general charger?
Especially for travel, having to carry a single charger would be preferred.
I ran into a similar problem with a friend's Nook Color, only there the problem seems to be a proprietary cable. Even in that case we discovered that a good charger (iPAD version) and a standard cable would work, just pretty slowly.
I may have missed the answer in my searching, and if so, please point me in the right direction. Thanks.

ocostich said:
Having looked through many pages of discussion about this I did not see the answer to my question, whether the Nexus 7 charger will charge my other devices, phone, ASUS Transformer, etc..
Click to expand...
Click to collapse
I haven't tried to search, but I have used my Nexus 7 charger to charge my Acer phone and my Logitech K800 keyboard and H600 headset.
I can't remember if I used the cable that came with the charger. I have a stack of micro USB connectors around. I try to bin any that are power only. Useless bit of wire. Maybe that is why things are amiss at your end.

I've charged my friends HTC X One with the Nexus charger. Worked fine.

Haven't even taken the nexus charger out of the box. Been using my Samsung chargers from my SII with no issues. Hope I don't have a problem using the auto charger.
BTW, a search would have led you to this thread.
http://forum.xda-developers.com/showthread.php?t=1823377

Guessing the charger you're trying to use isn't providing edd enough current... The standard charger puts out 2A (2000mA) when standard USB is 500mA and many chargers are 1A... That said no charger/cable combo I've tried has failed to charge (just sometimes it's glacially slow if its a 0.5A/1A charger)

1.2A output charger?

I just found out that My old Galaxy S charger has only 0.7A while the N4 charger is 1.2A
If I use the old charger for N4, it should be slower..
But is it okay to use this new charger for my old phone or bluetooth earpiece?
I don't want to bring two charger out but I may need to charge different devices
Also, is the USB cable came with N4 a special one that can deal with 1.2A,
or every USB cable is fine for that?

Emama said:
I just found out that My old Galaxy S charger has only 0.7A while the N4 charger is 1.2A
If I use the old charger for N4, it should be slower..
But is it okay to use this new charger for my old phone or bluetooth earpiece?
I don't want to bring two charger out but I may need to charge different devices
Click to expand...
Click to collapse
Not sure if it's recommended, but I've done it without issue.
Slightly off-topic: If anyone has a lead on some cheap 1.2A chargers, please post a link. Bought some low amperage ones off DX but I'll be dead before they finish charging the phone.

Emama said:
I just found out that My old Galaxy S charger has only 0.7A while the N4 charger is 1.2A
If I use the old charger for N4, it should be slower..
But is it okay to use this new charger for my old phone or bluetooth earpiece?
I don't want to bring two charger out but I may need to charge different devices
Also, is the USB cable came with N4 a special one that can deal with 1.2A,
or every USB cable is fine for that?
Click to expand...
Click to collapse
As long as the voltages are the same, which they probably are (5V is standard for cell phone chargers), you'll be perfectly fine using the 1.2A charger on the 0.7A phone. Your old phone will only pull the amount of amps that it can use - it won't pull more than that. What you want to be careful of is charging a phone with a charger that puts out more volts than the phone can handle - this is where you can fry your phone.
As for your second point, I'm pretty sure that any USB cable will be fine.