Database Develop

Nexus 7 Car Charger

I was just wondering if anyone here has spotted a Nexus 7 car charger? Does it not matter if it's not specifically made for the Nexus 7? I'm trying to find one to buy online and I'm having some troubles. First post here I think I came to the right place though. :laugh:

Silversub745 said:
I was just wondering if anyone here has spotted a Nexus 7 car charger? Does it not matter if it's not specifically made for the Nexus 7? I'm trying to find one to buy online and I'm having some troubles. First post here I think I came to the right place though. :laugh:
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Clicked thanks on accident lol. Any USB car charger should work, but I would make sure you grap a 1 amp one just so it has enough output to charge the tablet at a decent rate.

probably better with a 2amp one. samsung makes one for the tab2, about $12 on amazon, and just use your own microusb cable to connect to it.

vroomr4 said:
probably better with a 2amp one. samsung makes one for the tab2, about $12 on amazon, and just use your own microusb cable to connect to it.
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Heck, I didn't even know they had 2 amp ones.

vroomr4 said:
probably better with a 2amp one. samsung makes one for the tab2, about $12 on amazon, and just use your own microusb cable to connect to it.
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Yup, go with a 2Amp one. Most of the cigarette lighter usb chargers are 2.1A.

Avoid the cheap Chinese 2+Amp car chargers, they can be so badly made they cause enough interference to wipe out your FM radio.
/edit 1Amp will be fine but don't go lower, the N7 would likely burn it out.

FYI I tried a 5v 1a wall charger and my gnex7 said f u wouldn't take the charge. 2a or nothing I say
Sent from my Nexus 7 using xda app-developers app

Troute said:
Avoid the cheap Chinese 2+Amp car chargers, they can be so badly made they cause enough interference to wipe out your FM radio.
/edit 1Amp will be fine but don't go lower, the N7 would likely burn it out.
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Do you already have the Nexus 7? If so, can you take a look at the charger and see if rated at 1A output and/or try to charge it with a charger that came with your phone?
I am just curious if it can actually charge with less than 2A. The charger listed in the Play Store outputs 2Amps and I thought most tablets require 2A to charge.
https://play.google.com/store/devic...sMSwyLDExMSwiZGV2aWNlLW5leHVzXzdfY2hhcmdlciJd
Fusion777 said:
FYI I tried a 5v 1a wall charger and my gnex7 said f u wouldn't take the charge. 2a or nothing I say
Sent from my Nexus 7 using xda app-developers app
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Thanks for verifying.

gsrrr said:
Do you already have the Nexus 7? If so, can you take a look at the charger and see if rated at 1A output and/or try to charge it with a charger that came with your phone?
Thanks for verifying.
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Still waiting, should only be a couple of days now though...

I know this is something most people never do...but if you read the manual for the Nexus 7 it says you can charge it on a standard USB port with the Nexus 7 in sleep mode (no doubt because the power draw is much less). Standard USB ports are typically .5A...sometimes less. I would say that's the actual minimum. For the fastest charging 2A is what you want though.

The ASUS charger that comes with the N7 is rated at 2A (10W). I tested an old BlackBerry 0.85A (~4W) micoUSB charger and it seemed to work fine and the N7 didn't complain though I didn't do any scientific tests against the charging rates.
The 0.5A (2.5W) chargers probably won't even charge the unit if you're actively using it.
Cheers,
Kermee

Kermee said:
The ASUS charger that comes with the N7 is rated at 2A (10W). I tested an old BlackBerry 0.85A (~4W) micoUSB charger and it seemed to work fine and the N7 didn't complain though I didn't do any scientific tests against the charging rates.
The 0.5A (2.5W) chargers probably won't even charge the unit if you're actively using it.
Cheers,
Kermee
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Yeah...read my previous post...the manual says you can charge on a standard usb port (0.5A sometimes less) but only if the Nexus 7 is in sleep mode...ie you're not actively using it. If you can't charge it while connected to USB and it's in the sleep state...then your usb port is probably a low power USB port (<0.5A).
For those looking for a good backup battery charger for it...I recommend this one: http://www.amazon.com/gp/product/B005NGKR54/ref=oh_details_o05_s00_i00
works perfectly with my Nexus 7 (just make sure to use the correct USB out port on it as only one of them is 2A)

DealExtreme Charger
Saw this one on DealExtreme, even come with cable:
http://www.dealextreme.com/p/car-ci...-port-for-google-nexus-7-tablet-146751?item=8
Will be ordering will update when arrives. Also they're carrying Nexus 7 Cables in Pink, Green and Orange.

Was using a Sprint micro-USB plus charger (model PVX8823) with attached cable and standard USB port for 2nd device that I was using for my phone. Output is 0.65Amp which isn't sufficient and will slowly drain the N7 battery while in use. ~$35 at Sprint retail store. Wouldn't recommend for obvious reason.
Fortunately, had a spare Motorola SPN5400A 1Amp I bought with some screen protectors from Amazon because it was cheap like ~$5. 1Amp is sufficiently to maintain the charge while in use at near worse case running 3D games like Dead Trigger, Shadowngun, etc. So, 1Amp is minimum threshold.

You need a charger that:
1) Is capable of 2A (1.5A may be sufficient, 1A is a little too low)
2) Shorts D+ and D- together - This rules out most iPad chargers.
If it says it is made for iPod/iPad it will not work without modifications or adapters.
Samsung tablet chargers will work.
If you take an iPad charger, open it up, and short D+ and D- together, it will work.

dkhilo said:
Saw this one on DealExtreme, even come with cable:
Will be ordering will update when arrives. Also they're carrying Nexus 7 Cables in Pink, Green and Orange.
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Sorry to bump an old thread but any feedback with that charger? I'm looking for one with 2 port to power both my N7 and my droid razr maxx while in car.

dcpuser said:
Sorry to bump an old thread but any feedback with that charger? I'm looking for one with 2 port to power both my N7 and my droid razr maxx while in car.
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Most chargers for android phones will work. I use my HTC charger for ,mine and I bought a car charge that has the standard micro USB connector but also has another USB port so I can charge 2 devices at the same time with 1 charging unit. You droid razor charger will work just fine. You just need to locate a charger that is capable of charging 2 devices at the same time such as this one
http://www.amazon.com/GTMax-Metalic-Vehicle-Charger-Adapter/dp/B005X5L8PI
You'll be good to go with this.
Sent from my Nexus 7 using xda premium

dcpuser said:
Sorry to bump an old thread but any feedback with that charger? I'm looking for one with 2 port to power both my N7 and my droid razr maxx while in car.
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Check out this oem charger from Sprint. Its a dual port charger with a 2a output and you dont have to worry about buying a knock off charger that may or may not perform as expected. It also can be used as a wall charger. Good price too....
http://www.ebay.com/itm/130712043019?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1459wt_1399

So are any of these confirmed 100% to work? the one a few links back (GTMax) says works with iphone, and I thougth that meant would NOT work with N7. So I am confused on what will work, and I am already on my 2nd Nexus7 being I blew out the USB trying a bunch of differnt chargers for the car.
I would like something that is small and can have multiple USB plugged in, but not a show stopper, just hope to find something on Amazon (Prefer Prime) so I can oder with my case today. Really want to use this in the car more (GPS\GoogleMusic..ect.), but with no power not a great option.
Thanks in Advance,
Drops

dkhilo said:
Saw this one on DealExtreme, even come with cable:
In for the orange so it will be easy to spot if misplaced. Thanks!
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Fast charge hack

I bought what i thought were a couple higher quality universal chargers. They charge my razr fast but won't charge my nexus 7 at all. I have one of the chargers pulled apart but before I do any soldering I want to make sure -- if I cross the 2 data points will it work?

Well I couldn't wait 10 minutes so I tried. Answer: no. Wtf?

Can anyone tell me how to hack these chargers to make them work? Is there a resistor I need to remove?

Isn't it more likely to be a software thing?
With my samsung Tab 7.7 i couldn't charge it using my ipad charger until a Dev modded the software on the tablet.

are they 2Amp chargers? most universal chargers are only 1Amp

Well whatever the problem is, I want to charge my tablet in more than one place, I want to charge it faster than the 16 hours generic chargers are taking, and I don't want to pay $30 for OEM chargers.

If your tablet is taking 16 hours to fully charge, return it. I can drain mine after heavy use of the day and its still fully charged in under 6 hours.
Sent from my Nexus 7 using xda app-developers app

@soldeus: There's nothing wrong with my tablet. The OEM charger works fine and some of my generic chargers work, they just don't have the current. (See below)
@vivan: They are 1A chargers, but they should still work. They don't charge at all. The 500ma Blackberry charger I'm using here at work will charge it in about 8 hours.
Ironically the move to almost-universal micro usb chargers has made the market for them even worse. Now, instead of having to buy a new charger every time you buy a new phone, you have to buy a dozen different chargers till you find one that actually works. Like I said, I didn't try to cheap out. I got a high quality charger.

qoncept said:
@soldeus: There's nothing wrong with my tablet. The OEM charger works fine and some of my generic chargers work, they just don't have the current. (See below)
@vivan: They are 1A chargers, but they should still work. They don't charge at all. The 500ma Blackberry charger I'm using here at work will charge it in about 8 hours.
Ironically the move to almost-universal micro usb chargers has made the market for them even worse. Now, instead of having to buy a new charger every time you buy a new phone, you have to buy a dozen different chargers till you find one that actually works. Like I said, I didn't try to cheap out. I got a high quality charger.
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The OEM charger is 2A for a reason. Because the tablet uses more power, it needs more current to charge at a fast pace.
Your generic 1A chargers are probably just enough to keep the tablet powered on, without draining (or charging) the battery.
If you can find a 2A universal charger, it should work just like the OEM one.

reiji said:
The OEM charger is 2A for a reason. Because the tablet uses more power, it needs more current to charge at a fast pace.
Your generic 1A chargers are probably just enough to keep the tablet powered on, without draining (or charging) the battery.
If you can find a 2A universal charger, it should work just like the OEM one.
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No, my 1A chargers are doing NOTHING at all. I plug it in and the charging icon doesn't come on. Reviews have tested these chargers at about 950ma and as I said, my 500ma Blackberry charger isn't too bad.. It's not lack of power, it's something else.
My guess is it has whatever resistor it needs to make it an "ipad" charger. And the vast majority of 2A chargers will, too.
So.. back to my original question: what do I need to do to make this charger charge my tablet? I KNOW it's possible. I just need to find the guy who can tell me how.

I also need a charger for my car, my usb power adapter in the car does not work, need to know what car charger will work as this tablet is supposed to be my car stereo replacement, sucks having to bring your stereo in to charge it and hope it lasts till you get done work

I bought the Scosche dual 10 Watt car charger, isn't here yet though. It does say it wont charge the Samsung tablets, maybe due to the proprietary cord because apparently there is a cord that works with them. It's not a specific ipad charger and does say it works with Android devices and tablets.
On a side note, what's the best way to determine what your N7 is actually charging at?

Both of my generic chargers won't work either, a 2.1A generic iPad charger, and a 1A standard USB charger. Considering it WILL charge off a 500ma USB port, it's not a current/amperage issue, it's a software/proprietary hardware issue.

b22ri22an said:
I also need a charger for my car, my usb power adapter in the car does not work, need to know what car charger will work as this tablet is supposed to be my car stereo replacement, sucks having to bring your stereo in to charge it and hope it lasts till you get done work
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I use a verizon branded car charger to charge my N7 but I think they charge $30 for it at the vzw store.

I suggest you read this page as it may have some info to help you modify your charger:
http://www.ladyada.net/make/mintyboost/icharge.html

neilrl79 said:
I use a verizon branded car charger to charge my N7 but I think they charge $30 for it at the vzw store.
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the cost isn't so much the issue, its the actually working part. do they have one with an angled micro usb so i can mount the tablet in the car properly or preferably a usb adapter one where i can use my own cord

For $30 you could order a handful of different ones on ebay or monoprice and find something that works. But I want a dual charger.

grim82 said:
I suggest you read this page as it may have some info to help you modify your charger:
http://www.ladyada.net/make/mintyboost/icharge.html
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does that mean a usb adapter that is certified to work with an ipad will work for my n7

b22ri22an said:
does that mean a usb adapter that is certified to work with an ipad will work for my n7
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I won't say 100% but I would bet the probability is very high. For the 1A charging they all seemed to play the same game with the voltage on the data lines. Not sure you'll get 2A but you'll at least get 1A.
Edit... maybe not, see this thread:
http://forum.xda-developers.com/showthread.php?t=1781680

I have a philips as351 audio dock that pushes 2A out of the micro-usb charger and the usb port on the back and neither will charge the N7. Bummer because it looks so nice on the dock to

4.2A Car Charger on ebay...need help...

Hello, Long time follower, first time poster.
I cannot post the link, but if you search "Juiced Systems 4.2 AMP" in ebay it's the first item under "Best match" and it's $19.99
Has anyone tried these chargers that claim 2.1A per USB port? Or does anyone know of any similar car chargers that charge 2 devices @ 2.1A?
I just want to buy the best charger that isn't going to blow up my phone, and a dual charger would be excellent if possible.
Thanks in advance.

giz_mang said:
Hello, Long time follower, first time poster.
I cannot post the link, but if you search "Juiced Systems 4.2 AMP" in ebay it's the first item under "Best match" and it's $19.99
Has anyone tried these chargers that claim 2.1A per USB port? Or does anyone know of any similar car chargers that charge 2 devices @ 2.1A?
I just want to buy the best charger that isn't going to blow up my phone, and a dual charger would be excellent if possible.
Thanks in advance.
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If it's the same one here from amazon http://www.amazon.com/Juiced-System...dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1 it appears to be apple only.

The one Android customer from that Amazon link said:
I bought this assuming it would charge my Droid DNA at an AC rate. Unfortunately, it charged at a USB rate and could not keep up with usage while driving.
It sounds like with that particular device, in order to get an Android phone to charge at an AC rate is to either modify the charger (through soldering) to short out the data pins or use a USB charge-only cable (DIY modification of an existing cable or purchased one). The Android phone should then see the charger as AC instead of USB for, hopefully, full and faster rate of charge.

I know you are looking for dual port, each with 2.1A - but I wouldn't hold my breath this one will output dual 2.1A without throttling down one of the ports. Its impossible to fit quality circuit in a small cigarette lighter package where due to excess heat the efficiency of your converter will decrease. And even if they manage to produce 4.2A you will either blow your fuse or melt your charger. Just think about it, you won't have any air circulation to even cool it down.
I only trust dual port chargers with 2.1A/1A rating. I reviewed one before - HERE from iSmooth which does work! Also, to my surprise, iSmooth charger was actually made for iPad/iPhone but it WORKS perfectly with Note 2. I can't voucher for other Apple converters, and as a matter of fact I have another one with a separate Apple and Android ports and Note 2 doesn't charge from Apple port. But the one from iSmooth I'm using right now works perfectly for Note 2 and also looks awesome in the car with a blue glow light

Man I'm confused, Kensington Charger don't work with Asus Tablets?

EDIT - Post #6 has a quote from Kensington confirming the charger does not work with the Nexus Tablet
So been trying to get a dual-USB 2.1A charger to use with my Nexus 7 and my old desire-Z phone (I also have a 1st gen iPad so figured would be a nice perk for both ports to deliver that juice).
I even went as far as buying a new USB Cable thinking something was wrong with my cable and flashing a couple of different kernels (thinking it was maybe that).
Fact is whenever I plug my N7 into a Kensington AbsolutePower 4.2 w/ PowerWhiz (K39690AM), Battery Monitor Pro widget will say in green "AC Plugged", "Discharging", and if it does show "Charging", it's only drawing in around 130mA or so. But yet on my Desire-Z (G2) I plug that in, it'll show maybe around 500mA (it won't go over 1A because it's designed not to for smart phones).
However If I plug the N7 into a Samsung 2.1A charger that came with a Galaxy Tab 2 7.0, The N7 will show a power draw from the charger a little above 1,800mA (and then goes down to around 500 or less once it hits 99%), similar situation with the samsung charger + my G2.
So I'm constantly googling trying to figure out whats up, and the only thing I've come across are various reviews on Amazon (they list this as a Dual 2.1A USB charger), with some complaints saying they don't work with Asus Tablets and another saying it wouldn't charge much at all on his Nexus 10.
So I'm wondering... what's up with that, and why does it not say it's not compatible on the box (though guess they sort of did by excluding Asus and Google from the list of brands on the side).

Its charging. Just the os is not showing it properly
Sent from a phone that's 2 Note-worthy, via XDA Premium HD app.

madman604 said:
Its charging. Just the os is not showing it properly
Sent from a phone that's 2 Note-worthy, via XDA Premium HD app.
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As I said, I'm using Battery Widget Monitor Pro. IF it was only the OS it would show the exact same deal with the Samsung 2.1A Charger, Nook 1A charger, HTC 1A charger. But instead on ALL chargers except the Kensington one, it shows a much higher charge rate (on the 1A around 800mA charge, on the Samsung around 1.7A charge).
But on the Kensington one never more than 500mA (usually around 300-400). I even exchanged the unit for a new one, and still the exact same behavior. I think the powerWhiz feature of the charger is detecting it not as a tablet but rather as a generic USB Device and is not providing more than 500mA for 'safe' charging. Just like how it won't charge my phone past 1A since it's detected as a SmartPhone even though it's a 2.1A port.

kbeezie said:
As I said, I'm using Battery Widget Monitor Pro. IF it was only the OS it would show the exact same deal with the Samsung 2.1A Charger, Nook 1A charger, HTC 1A charger. But instead on ALL chargers except the Kensington one, it shows a much higher charge rate (on the 1A around 800mA charge, on the Samsung around 1.7A charge).
But on the Kensington one never more than 500mA (usually around 300-400). I even exchanged the unit for a new one, and still the exact same behavior. I think the powerWhiz feature of the charger is detecting it not as a tablet but rather as a generic USB Device and is not providing more than 500mA for 'safe' charging. Just like how it won't charge my phone past 1A since it's detected as a SmartPhone even though it's a 2.1A port.
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The N7 has a circuit to detect whether the USB cable is plugged into its charger or into a regular USB port. The N7's charger shorts the two data pins. If your charger doesn't short those two pins, the N7 will never go into "high charge" mode.

There is a simple mod to do. Either take the charger apart and short what the data pins should be on the usb port or short the data wires together in a cheapo usb cable at the micro usb side. That will make a charge only cable but it will give. What you need.
Sent from my SPH-D710 using xda premium

So turns out I wasn't crazy after testing two of their chargers.
Dear Karl:
Thank you for contacting Kensington Technical Support.
We understand that our Absolute Power™ 4.2 Dual Fast Charge is not charging your Nexus tablet properly, we regret to inform you that Absolute Power™ 4.2 Dual Fast Charge for Tablets is not compatible with Nexus Tablet, hence we would be glad to refund you the amount.
If the date of purchase is within 90 days, we request you to utilize the 90-days Money Back Guarantee policy.
Please click on the following link to know about the 90-days Money Back Guarantee form
http://www.kensington.com/kensington/us/us/s/1570/90-day-money-back-guarantee.aspx
We are sorry for the inconvenience caused.
If you need further assistance, please feel free to reply to this message.
For any further assistance please feel free to reply back to this email or you may want to call us on our toll-free number 1800-535-4242, Mon Fri 07:30 am to 04:30 pm PST.
Please Read This!
Kensington Technical Support incidents are only processed via our support web site, not via email. Please do NOT reply to this email, but rather you must click on the link below which will bring you to the Kensington Technical Support web portal where you can initiate questions, modify your active incidents, or perform maintenance on your support account.
Again, please do NOT respond to this incident via email, please click on the link below to access your support incident. Thank you.
http://www.kensington.com/kensington/us/us/s/1708/mystuff.aspx
Kensington Computer Products Group
Regards,
Shiva Kumar
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graydiggy said:
There is a simple mod to do. Either take the charger apart and short what the data pins should be on the usb port or short the data wires together in a cheapo usb cable at the micro usb side. That will make a charge only cable but it will give. What you need.
Sent from my SPH-D710 using xda premium
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Yea... I'm not taking apart a charger. I just returned the second one to the store where I got it and got one that did work. Also that method won't work with the kensington, with it's powerwhiz feature if it can't detect the device it'll limit to 500mA for safety.
Besides I've already returned the second charger (I exchanged the first one, re-ran tests, etc), and ended up getting an RCA 4-outlet power strip/surge protector that has two USB ports (one for 2.1A charging) that does work.

All android devices look for 200ohms on the data pins to determine if it is a charge vs data source. Except the handful of proprietary connections (ex:Nook Color).

Yep. All things said in this thread are true. What I've found to work great with the stuff I already have is a Samsung Galaxy S4 charger. That thing
charges the N7 at about 1500 mA. Measured with my multimeter. It's weird though,
it'll start around 800mA and after about 45s to a minute it will start pulling in almost double that.
Crazy.

USB car charger

I have a few of the belkin/off brand dual USB auto adapters. But they all have output of around 500mA so basically when using bluetooth and GPS on the rd I'm drawing more power than I'm getting. I've looked around on amazon for some usb adapters but seems like a lot of them for some reason only really fast charge with IPads or other apple devices and for some reason they slow charge android devices. Apparently iphones have some sort of communications with the chargers to draw more power.
So my question is does anyone have one or know of one that works with the G2 and fast charges. I'd prefer one that is flush like my existing belkin and not one that sticks out a few inches. Dual ports would be nice, but at this point I'm not picky. Having said that, I'd like to not spend $30 on it.

To add to it, I installed some battery monitor widget and while in the car today I just popped it open and noticed that it said "USB Connected Discharging" So basically It actually drains power quicker than if it wasn't connected to the charger at all!

mims1979 said:
I have a few of the belkin/off brand dual USB auto adapters. But they all have output of around 500mA so basically when using bluetooth and GPS on the rd I'm drawing more power than I'm getting. I've looked around on amazon for some usb adapters but seems like a lot of them for some reason only really fast charge with IPads or other apple devices and for some reason they slow charge android devices. Apparently iphones have some sort of communications with the chargers to draw more power.
So my question is does anyone have one or know of one that works with the G2 and fast charges. I'd prefer one that is flush like my existing belkin and not one that sticks out a few inches. Dual ports would be nice, but at this point I'm not picky. Having said that, I'd like to not spend $30 on it.
Click to expand...
Click to collapse
There is a long thread on this already.
http://forum.xda-developers.com/showthread.php?t=2454301
It seems that the bigger issue is not finding a 2amp charger, but a USB cable with the correct gauge similar to the oem one. I believe the oem cable is 20 gauge and I believe I found one on Amazon.
http://www.amazon.com/gp/aw/cr/B009Z94PV2/ref=mw_dp_cr

I don't get why it's such a difficult thing to find? Doesn't LG make a car charger that charges it's own phone?
I use my older Motorola ones and they work fine. Not full 2 amp but I can stream iheartradio or Pandora and the phone will charge up still. But the screen is off, not like using GPS. Still would like a fast charger tho.

I have an Anker 24w 2 port charger and it charges my phone as fast as the wall charger. I tested it with a charger doctor and it does read 1.8a current flowing thru.
Sent from my LG-D802 using Tapatalk

I got a charger made by rocket dog I do believe for best buy best car charger I've ever had and it has an extra usb on the top
Sent from my LG-LS980 using xda app-developers app

It's not the charger that seems to be the problem. 2a Chargers can be had in many places. It seems a 20 gauge wire is the difference.

Here is a link to a post I made in another thread with a tested and working setup in my car
Cheap too.
http://forum.xda-developers.com/showpost.php?p=50053524&postcount=229

No, the problem is the op isn't using a charger designed for Android.