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car charger

Any idea why I can't seem to charge my Nexus 7 with my car charger?
i have both a generic Micro USB charger and I have one of the dual USB ports that you put into the cigarette lighter. It wont even acknowledge that I have plugged anything into it.
i have used the USB port to charge MANY different cell phones my old Dell Streak 7 and even a friends iPad.
Any ideas?

joeclark said:
Any idea why I can't seem to charge my Nexus 7 with my car charger?
i have both a generic Micro USB charger and I have one of the dual USB ports that you put into the cigarette lighter. It wont even acknowledge that I have plugged anything into it.
i have used the USB port to charge MANY different cell phones my old Dell Streak 7 and even a friends iPad.
Any ideas?
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I think the N7 needs 2A to charge. a single USB is 500 mA and the dual 1A, so I don't think there's enough power.
Also check if the output of your microUSB cigarette charger is 2A

zaphyr said:
I think the N7 needs 2A to charge. a single USB is 500 mA and the dual 1A, so I don't think there's enough power.
Also check if the output of your microUSB cigarette charger is 2A
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well i think that answers my question. thank you

This one will work: http://www.amazon.com/gp/product/B0090SVY3K/ref=oh_details_o02_s00_i00
It charges at the same rate as the stock AC charger.

The N7 is one picky device for charging. I have several chargers for the car that charge the iPad but not one will charge the N7. Same as AC chargers. This set works for me
http://www.amazon.com/dp/B008FF84K0/ref=pe_175190_21431760_M2T1_ST1_3p_dp_1

This is what I use and it works just fine. I use it to charge my N7, GNote, Nook Color or my grandsons IPhone and it works equally well on all of them.
BTW, it prime available if you are a member.

dparrothead1 said:
This is what I use and it works just fine. I use it to charge my N7, GNote, Nook Color or my grandsons IPhone and it works equally well on all of them. Very unobtrusive and I like the fact that the fuse is easily accessable.
http://www.amazon.com/Ultra-Compact...sr=8-2&keywords=ultra+compact+usb+car+charger
BTW, it prime available if you are a member.
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That is exactly what I need to get.
Thank you.
Sent from my Nexus 7 using Tapatalk HD

It only charges via usb when the screen is off or when the device is off. Try plugging it in checking the battery % leave it awhile and then recheck the battery % you may find its gone up!
Sent from my GT-I9000 using xda app-developers app

Some chargers slower than others

Unfortunately I left my Nexus 7 charger in a hotel room a month ago and it has not yet been handed in. Consequently I have had to buy an off the shelf charger. One I tried stated that it was rated at 2 AMPS, and it does work, but at about 1.5-2x the charging time as the stock charger. I also noted that when using that charger the Nexus system did not say it was charging, although it obviously was.
I just obtained another charger rated at 2.5 AMPS and it performs exactly as the stock charger. Has anyone else noted this - that if the charger outputs less than 2 AMPS the Nexus 7 does not notify the use that it is charging and does so at a much slower rate?
Larry

My understanding - the charger has to let the device know it supports high current mode. Otherwise the Nexus limits it to 500 ma, which is correct for a cable plugged into a computer.
Sent from my Nexus 7 using xda app-developers app

rmm200 said:
My understanding - the charger has to let the device know it supports high current mode. Otherwise the Nexus limits it to 500 ma, which is correct for a cable plugged into a computer.
Sent from my Nexus 7 using xda app-developers app
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This is true; the same method applies to samsung chargers. There has to be 5v on one of the data lines as well to let the device now it should change to high-power mode.
Search for a tutorial on what to solder together inside of the charger or buy an official samsung charger of at least 1A (I believe Galaxy S2 chargers have that output).

We can only use the LG charger?

Since the battery life of the phone is quite poor it's only natural that i would like to charge it when i'm on class or with an usb cable when im using my laptop, using other usb chargers/cables, but on the manual says (of course) that we should only use it with the lg charger that comes in the box or an official nexus 4 charger .
It kinda sounds like bullsh*t until i remember what happened with my motorola milestone, sometimes when i used another charger the screen started doing crazy things, like swipping the homescreens by itself , oppening apps, until i charged it for at least a few minutes with the official charger, some months later my digitalizer died, so you can imagine how traumatized i am, but then i think what's the point of trying to make a standard out of microusb chargers if we can only use the official charger? what do you guys think?

I find battery life to be very good.
I have been using an old HTC charger on mine without issue though. I suspect the 'only use LG charger' is to cover themselves in case you kill the device with a cheap and badly made knock off.
Sent from my Nexus 4 using xda app-developers app

AW: We can only use the LG charger?
I have literally problems in draining my battery, running Franco's Kernel and Minco v6.
Anyway, using another charger should be no problem. I used the charger of my Asus Transformer and a mobile charger in my car without issues.
sent from my francoed Nexus 4

templope athletes,"
Feel free to use any USB wallcharger you'll find.
I tried some i had laying around (HTC, iPhone 5, iPad) and they all charged without trouble.. :good:

Yeah, I've used a 1A HTC charger with no issue. I accidentally left my lg charger at a friends house and had to use what I had.

the battery life is good, better than s2 with its extended battery, i was wondering about this too as i want to use a sony rx100 at 2amps to charge while im traveling.
on page 168 of the service manual it states the max charging current is set at 900mah, over voltage protection upto 28volts

The current should be controlled by the phone, not the charger. Therefore there shouldn't be a problem with more powerful chargers. The voltage has to be correct, though

The phone certainly regulates the power it takes.
If you are really worried about the chargers just flip them over and read the output ratings. Most of them are exactly the same these days.
Sent from my Nexus 4 using xda app-developers app

I use my GNex charger with no problems.
P.s- the battery life on this device is outstanding, you just need to find the kernel that works well on your device
Sent from my Nexus 4 using XDA Premium HD app

Any USB charger will work. Note the output current on the charger though, as that will impact how fast it can charge and whether or not you can have the screen on while you charge. The LG charger that comes with the phone is 5v 1.2a, an iPhone charger (at least as of the 4S when I got mine) is 5v 1a and an Amazon Kindle charger is 5v 0.85a. The USB 2.0 spec calls out a max power output of 5v 0.5a.

EnIXmA said:
I use my GNex charger with no problems.
P.s- the battery life on this device is outstanding, you just need to find the kernel that works well on your device
Sent from my Nexus 4 using XDA Premium HD app
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+1 for the GNex charger.

[email protected] said:
Any USB charger will work. Note the output current on the charger though, as that will impact how fast it can charge and whether or not you can have the screen on while you charge. The LG charger that comes with the phone is 5v 1.2a, an iPhone charger (at least as of the 4S when I got mine) is 5v 1a and an Amazon Kindle charger is 5v 0.85a. The USB 2.0 spec calls out a max power output of 5v 0.5a.
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I'm confused , the lg nexus 4 charger is 5.0v 1.2A and my galaxy nexus charger which i use sometimes with my nexus 4 is 5.0V 1.0A , what does this mean? what's the difference?

My Nexus 4 is on the way so i cant comment on that but my Sony Xperia S acts differently to different USB leads even on the same charge unit. It might charge at 500mAh or 950mAh (on a charger rated at 850mAh), the screen might be fine or it might act erratic and it all depends on the lead plugged in to the charger

I used Samsung/blackberry chargers and they worked. Not sure if they were as efficient though.

I pretty much use anything but the LG charger and have been doing so over a month. So feel free to use any quality charger you like.
I also charge of my Philips Qi pad and off computer USB ports.
As long as it's providing stable power or anything close to it, it's good.
Just be careful with (fake) cheapo chargers. Those might cause issues with the touchscreen going haywire while charging off them. I've also read that about some car chargers, but so far my cheap 2A 2port USB car charger that came of DX is working fine for me.
YMMV of course. But there is no need to stick to just the LG charger.

Nexus 4 QI Charger - Input and Output Question

Okay, let me start off by saying that I am complete noob when it comes to electrical matters, so excuse the silly question here...
I have found a USB powered QI charger for the Nexus 4 on eBay with an input of 5V and an output of 5V/1A. Two questions following from that...
1) Will the charge time be the same as if I just charged via USB?
2) Instead of connecting the USB end to my PC, could I not connect it to supplied Nexus 4 wall charger? If so, does it specs comply with those of the QI charger I just mentioned (i.e. will I get a fast charge time?)
Thanks in advance for the support.
Sent from my Nexus 4 using Tapatalk 2

Bump
Sent from my Nexus 4 using Tapatalk 2

Expect the charge times to be more compared to the Usb charger.. It can be ordered on fasttech.com for $40. Yes.. usb powered.. The AC adapter one on fasttech is $35.. All hav free shipping!!!!!
ii) That would depend on how much power the wireless charger needs.. The normal nexus 4 adapter is 1.2A.. If the wireless charger wants 1.5A, it will be slower due to less power... but since it is USB powered.. normal pc/laptop usb ports give 0.5A so your original nexus 4 adapter will be fine!!!!
Also.. wirless charging tends to heat up the phone sometimes.. so watch your temps..

I have the Energizer Qi charger and they warn that the Nexus supplied wall charger should not be used to power the WiFi charger. It doesn't have the power capacity to run the wireless charger.
Sent from my Galaxy Nexus using xda premium

The cahrging rate is almost the same
The power requirment for this charger is 5v 2A input. According to my test, as long as your power supply stay above 1A output, you will have no problem at all, just will charge a little bit slower. but once I hooked up with a samsung charger that was rated at 700ma, the red light goes on after a beep. The problem is, most of the usb chargers in the market are overrated that's why you will get red light on with these inferior charger. I purchased mine from a seller on eBay called gadgetsalon who included a original HP Touchpad adapter with my purchase which is fully rated 2A output, I have been using mine for almost 2 months now never had a single problem ever with my Tmobile GS3. BTW, I charge my phone with a ballistic case on all the time.
esskayy said:
Okay, let me start off by saying that I am complete noob when it comes to electrical matters, so excuse the silly question here...
I have found a USB powered QI charger for the Nexus 4 on eBay with an input of 5V and an output of 5V/1A. Two questions following from that...
1) Will the charge time be the same as if I just charged via USB?
2) Instead of connecting the USB end to my PC, could I not connect it to supplied Nexus 4 wall charger? If so, does it specs comply with those of the QI charger I just mentioned (i.e. will I get a fast charge time?)
Thanks in advance for the support.
Sent from my Nexus 4 using Tapatalk 2
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Charge S4 with 12w iPad charger

I'm using a new iPad charger, the 12w version.
It's rated as a 5.2v 2.4a adapter. This is actually more than the s4 adapter which comes in the box which is rated 5.0v 2.0a.
The stock adapter charges the phone whilst I'm using it no problem yet the iPad charger says its charging but only seems actually increase my % when the screen is off. I don't understand this. Same cables so its not that.

The apple charger has pins 2 and 3 configured differently than the Samsung charger.
The phone will therefore not go into fast charge mode
You would need to properly modify a usb cable to get the phone to start fast charging using the apple charger.
http://forum.xda-developers.com/showthread.php?t=1384253
Sent from my GT-I9500

Thanks. Is there an app to monitor real time current stats or voltages being received?
Sent from my GT-I9505 using Tapatalk 2

Yeah theres an app called Galaxy Charging Current

That app doesnt work on this phone...
Sent from my GT-I9505 using Tapatalk 2

? Works on my i9505.

I get a constant reading of 460