[Q] Nexus7 charger with other devices? - Nexus 7 Q&A, Help & Troubleshooting

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)

Related

Charger that comes with Wing VS other chargers.. Did I make a mistake?

I got a Wing, and it came with that big ass charger that says use only for wing, mda, and dash. Well I JUST now read that on the charger. Its not that I've been using this charger on other devices, its that I've been using my OTHER usb chargers to charge my Wing.
Is this bad?
Im currently using the charger from my BlackBerry Pearl (well, until I found the Wing charger again), am I in any way damaging my battery life? Or perhaps not charing as fast as I should?
Im just curious why you can only use that charger on those phones, and if its so picky, if I'm doing harm using other chargers.
If anyone knows please do tell.
No worries. The tag you see is more of a marketing decision than a limitation of the adapter itself. You can use that safely and normally on any device that requires a standard USB charger. And vice-versa, you can use any standard USB charger to charge your phone with zero adverse effects.
... well, as long as it's not a REALLY cheap charger.
right on.
I didnt know if the "wing charger" had some type of extra output to help charge faster or something.
I use a Motorola Razr car charger and it works just find.
I have noticed once or twice, for some odd reason, sometimes the Wing wouldn't "recognize" when I plugged it in with a razr home charger... like it wouldn't show that it was charging ... but maybe it was just a crappy charger.... I don't know. But I have charged it with a Blackberry 8000 charger with no problems.
I always wondered myself whether or not it would be a problem... bc the Wing's usb plug isn't a "standard" usb, but it's got a weird shape.... but I still think its just a marketing BS technique to get you to buy THEIR like $40 chargers.
Actually it may not damage your device, but may damage others using it the other way around.
Moto RZ charger is 850MA Output
T-Mobile Charger is 1A
Output
After charging my raz on accident with the t-mobile charger it seems like it can no longer hold a regular constant charge...
This also is in effect with any itips/igo adapters there are two tips for the charger, one raz USB, and one for t-mobile higher powered devices
I'm using a Motorola Q charger in the car just fine. Which is nice, because it can also charge the GPS receiver that also has a mini USB jack.
Charging your wing with any min-usb charger (such as the standard motorola ones) is fine...
The only problem you might face is... if your phone is *completely* discharged, you will need the stronger charger to recover it... the Razr chargers and the like don't seem to have the strength to revive a completely 100% dead Herald
BBM-Lee said:
Charging your wing with any min-usb charger (such as the standard motorola ones) is fine...
The only problem you might face is... if your phone is *completely* discharged, you will need the stronger charger to recover it... the Razr chargers and the like don't seem to have the strength to revive a completely 100% dead Herald
Click to expand...
Click to collapse
I actually experienced this with an MDA (wizard) ... it had been uncharged for months, and I tried to charge it with a razr charger, and after sitting on the charger for like a day ... it had zero charge.
duprade said:
I actually experienced this with an MDA (wizard) ... it had been uncharged for months, and I tried to charge it with a razr charger, and after sitting on the charger for like a day ... it had zero charge.
Click to expand...
Click to collapse
DAMNIT!!
I did this too!
I had a wizard I was going to use before I got my wing. It wouldnt charge, I thought the battery was trashed, so I bought a new one.
Though I only spent 10 bucks on the battery, I wish I would of known. Though I bet a real charger for it would of been more then the battery.

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 Issue. Difference between Meizu and MicroUSB cables?

I have not done much research to find out why, mainly because most discussion is in Chinese. It seems that the device cannot charge properly without the stock Meizu cable. Does anyone know why this is? It appears to be a standard MicroUSB cable.
I'm using a Kindle Fire charger right now and it's charging fine.
Sent from my M030
and the stock white cable right? Charging off various sources isn't a problem. The problem is the cable.
AdamOutler said:
and the stock white cable right? Charging off various sources isn't a problem. The problem is the cable.
Click to expand...
Click to collapse
My Meizu cable is black and that works just fine as well
Sent from my M030
If you can give me the link to the Chinese discussion, I can translate and roughly summarise the discussion and findings (if any) for you.
It might be just like the Nexus 7 discussions where people think the magic is the cable, but then you find out that when they change the cable they also were using an iPad charger...
Don't you have an MX Adam? Easy enough to test a few combos.
Charges fine on both my lg, Meizu and any other micro usb cable.
The charger is the magic here...
This device needs 2amp input to charge properly.
If your charger can't provide this you get flicker charges.
I think MrColdbird is more-or-less right.
My Meizu MX (4-core) charger looks like it's rated at 1.2A. Charging with a lower-power charger usually does not work, and even my portable battery pack with its 1.5A output only works while the external battery is at least half-full.
However, I also have a couple of 0.5A chargers that seem to work OK, and it charges OK from the USB ports on my laptop, which I think are 0.5A. All-in-all, it's very choosy when it comes to chargers! But you're right, the cable isn't really the issue.
Charlie
I don't know what's going on. I'm using a Nexus7 charger, a samsung charger and my computer. All three require the Meizu-White cable. Standard MicroUSB fails.
Are you guys using CN or HK versions? Mine's an HK.
Should be easy enough to test. Just measure for any resistance between the pins on the uUSB side of the completely unconnected cable. If you find any resistance between GND and ID, or between any other pins, they're playing games with us!
HK here to Adam.
So this adds to the mystery as well.
i got the mx032 as well, and the problem is the charger.
works with my following chargers:
-htc 12V (1A)
-ipad (2.1A)
-sony xperia (850mA)
-motorola milestone
doesn't not work with:
-samsung travel adapter (700A)
-noname 12V (1A+2.1A)
E:V:A said:
Should be easy enough to test. Just measure for any resistance between the pins on the uUSB side of the completely unconnected cable. If you find any resistance between GND and ID, or between any other pins, they're playing games with us!
Click to expand...
Click to collapse
Sometimes, I have such a situation
My M031 charges with Nexus 7 charger and cable.

Official Qi Cover and Mini Charger - Fail

So, I'm not sure what the issue is here. I purchased the official Qi charging cover for the S5 and the official Mini Charging Pad.
Every time I try to charge my phone on the pad, it goes for an hour or so then the light starts flashing orange. Charging pad works fine with my Nexus 5 and Nexus 7.
Any ideas? I've seen other scattered reports of this on the web but no solutions at all.
I'm getting the same issue and I thought it was just poor placement on the mat. But I have tried it placed in different places on the pad, none of which made a difference. I also thought it was possibly the Diztronic cover reducing the efficiency of the charge, so I removed it to charge the phone. Nope, same issue. Using the supplied cable and the 2A Samsung charger supplied with the S5.
The problem comes when I set it away to charge overnight, and I wake up to find there's no full charge (once worried when it only had 36%, not enough for my day).
Every time it fails, the orange indicator flashes on the Samsung charge pad.
It's starting to annoy me
I use a similar setup - mini charger with sview charging back.
The orange light indicates not enough power getting to the pad - try changing your cable. I'm using a blackberry playbook charger 1.8A - 5 dollars on amazon to power it now and it works fine. I'm about 6 months into it..
jonboi said:
I'm getting the same issue and I thought it was just poor placement on the mat. But I have tried it placed in different places on the pad, none of which made a difference. I also thought it was possibly the Diztronic cover reducing the efficiency of the charge, so I removed it to charge the phone. Nope, same issue. Using the supplied cable and the 2A Samsung charger supplied with the S5.
The problem comes when I set it away to charge overnight, and I wake up to find there's no full charge (once worried when it only had 36%, not enough for my day).
Every time it fails, the orange indicator flashes on the Samsung charge pad.
It's starting to annoy me
Click to expand...
Click to collapse
I was using the supplied wall wart and cable that came with the Mini Pad. Just took the thing back and bought a Tylt Vu instead. Charges perfect.
Kinda sad that a Samsung Qi pad and a Samsung Qi backplate on a Samsung GS5 doesn't work properly.
there is already a thread on the oem cover and charging transmitter, also i have posted within the thread about this problem.
hoitzed said:
The orange light indicates not enough power getting to the pad - try changing your cable. I'm using a blackberry playbook charger 1.8A
Click to expand...
Click to collapse
I've tried 3 different cables and 2 different 2A chargers. Still have issues.
2 of the cables are Samsung ones (one of which came with the Samsung plate), and the other from my Nexus 7.
Chargers are Samsung's 2A supplied with the S5, and Asus Nexus 5 2A charger.
kms108 said:
there is already a thread on the oem cover and charging transmitter, also i have posted within the thread about this problem.
Click to expand...
Click to collapse
I've tried searching for this thread, any chance you can link it please?
hoitzed said:
I use a similar setup - mini charger with sview charging back.
The orange light indicates not enough power getting to the pad - try changing your cable. I'm using a blackberry playbook charger 1.8A - 5 dollars on amazon to power it now and it works fine. I'm about 6 months into it..
Click to expand...
Click to collapse
orange led means error, flashing green led means less than 2.0a power supply is used, lit green led mean a 2.0a power supply is used.
it's a detection or compatiblity issue with the transmitter and receiver, whether it's oem or 3rd party product used.
---------- Post added at 11:13 AM ---------- Previous post was at 11:11 AM ----------
jonboi said:
I've tried 3 different cables and 2 different 2A chargers. Still have issues.
2 of the cables are Samsung ones (one of which came with the Samsung plate), and the other from my Nexus 7.
Chargers are Samsung's 2A supplied with the S5, and Asus Nexus 5 2A charger.
I've tried searching for this thread, any chance you can link it please?
Click to expand...
Click to collapse
sorry I never provide links, use the search function, it will show up.
Don't waste your time trying to fix the problem. Its an issue with the Samsung mini charging pad. I replaced it with a 3rd party 3-coil charger and all the problems I encountered (charging error, erratic charging performance resulting in constant waking up of the phone, etc) disappeared.
dinkydong said:
Don't waste your time trying to fix the problem. Its an issue with the Samsung mini charging pad. I replaced it with a 3rd party 3-coil charger and all the problems I encountered (charging error, erratic charging performance resulting in constant waking up of the phone, etc) disappeared.
Click to expand...
Click to collapse
Same here, and the same recommendation from me. The Mini Charger is junk.
The mini charger has compatiblity problem, works fine with my nokia lumia 930, and S5 using a yijieneng receiver, but has problems with it's own qi cover and a few other receiver.

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