I have a droid razr and that phone comes with a phone charger that has 2 usb ports on it so you can simultaneously charge 2 devices. Last night I ran both my droid razr maxx and my Nexus 7 on that charger. I woke up in the morning after about 7-8 hrs of charging to find that my nexus 7 had only charged to approx 40% over night while my razr was completely full. Did this happen because I was not using the nexus "stock" 2amp charger or are there other issues at play here? Thanks for the replies.
I use my Samsung phone charger because it's the one plugged up beside my bed. I'm pretty sure it is a 1.0 amp and it charges just fine. I also use my Samsung car charger with the N7.
fosser2 said:
I have a droid razr and that phone comes with a phone charger that has 2 usb ports on it so you can simultaneously charge 2 devices. Last night I ran both my droid razr maxx and my Nexus 7 on that charger. I woke up in the morning after about 7-8 hrs of charging to find that my nexus 7 had only charged to approx 40% over night while my razr was completely full. Did this happen because I was not using the nexus "stock" 2amp charger or are there other issues at play here? Thanks for the replies.
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Unless your charger can provide at least 1A to both ports simultaneously, then it's probably a 1A charger but the 1A is split between both ports (effectively making it 500mA to each port when both ports are in use). It's been determined that with the stock cable, the Nexus 7 can only draw 1A (even though it comes with a 2A charger) so to get the same charging performance as the stock charger, your other charger should provide at least 1A to whatever port it's plugged into.
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Mine gets from 0% to 100% in about 6 hrs. Is that normal? Wonder if it seems a bit too long that's somehow contributing to my battery issues.. use original charger plugged into a wall socket.
tightline said:
Mine gets from 0% to 100% in about 6 hrs. Is that normal? Wonder if it seems a bit too long that's somehow contributing to my battery issues.. use original charger plugged into a wall socket.
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Yes, I believe that is normal. I just did a charge today, from 0% to 100% in about 4.5 hours. Quite quick I was very surprised.
Six hours seems pretty long. The lowest I've let my battery run down to so far is 55%, and it took two hours to get to 100% on the stock charger.
I get full charges from 10% or so in 2-3 hours.
Sent from my Nexus 7 using xda premium
tightline said:
Mine gets from 0% to 100% in about 6 hrs. Is that normal? Wonder if it seems a bit too long that's somehow contributing to my battery issues.. use original charger plugged into a wall socket.
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did you use the original wall charger or you charge it via PC's USB? I guess the wall charger is a bit faster.
eami said:
did you use the original wall charger or you charge it via PC's USB? I guess the wall charger is a bit faster.
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The wall charger should be around 4 times faster. You computer outputs around 500mA where as the wall charger is 2A (aka 2000mA).
Don't use third party USB cables with charger it also charge the nexus 7 slowly. This is what I found when I first bought it. Using original cable with original charger seems to charge it very quickly.
Sent from my Nexus 7 using xda premium
I'm using stock cable and charger plugged into the wall socket. Everything else is perfect, and not enough to return but a concern nonetheless. My Toshiba thrive charge blazing fast at 0_100% in 2_1/2 hrs.
Any other input?
tightline said:
Any other input?
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When you are charging, is your Nexus 7 powered on, or does it display the battery icon in the middle of the screen?
For reference, mine was powered on when it charged from 0% to 100%.
Hi I've noticed that my Nexus 7 is taking longer to charge now. 3 hours and only done 38% I'm pretty sure it was quicker than this when I first got it. This is from completely dead by the way.
Cheers Robbo
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My nexus also takes forever to charge, seems strange...
if it's connected to usb it's normal, if it's to the wall charger, it's not normal.
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That's strange. It usually takes 3 hours to be charged from lower than 20% for my Nexus 7 with AC. Haven't tried USB though.
I think a thorough wipe might help.
3 hours on the wall charger that came with mine will easily do it from under 30 to 100%. The other phone chargers we have kicking around all have much lower output. Never occurred to me they were that different (duhh) until I realized that it took significantly longer to charge on my wife's Blackberry charger, my old Palm charger, my LG phone charger. I had always used them interchangeably with the phones. The N7 charger has a 2A output and the others are 1A or less. The newest Blackberry charger is only 500 mA I think. After an hour or two the charge level has barely changed on the N7 with that one. Less convenient to always have to use the right one, but makes a big difference.
USB takes waaaay longer.
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.
The one that came with the phone is rated at 5V 1.2A...
The problem is, it's constantly giving off buzzing sounds and it also seems that sometimes it charges more slowly than other times, it also happened that when left overnight, in the morning the phone was charged to only ~85%... So I'm thinking of getting a new one. Is it safe to get a 2.1A charger?
Yes because it's the phone that courses hour much current to draw, the value of the charger is just a maximum that it can supply. The Nexus 4 doesn't even draw the Max 1.2A of the stock charger.
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The Nexus 4 only pulls 900mAh. 2.1A is overkill, but won't hurt anything.
Before I go and buy a second charger, what's the info on the usual chargers and the new one that is 2amp - will the old 1amp ones still work but they just charge more slowly or do you actually need a 2amp version for it to charge the phone?
Going by the iPad fiasco back in the day, I know the lower ampage did charge it but so slow that if you were using it whilst charging it, you would run out of power first even though it was on charge.
So far from what I have found is
Galaxy S2, S3 and Note 1 has the 1a charger
S4 and Note 2 has the 2a charger
Unsure whether cables make a difference - charging mine from 2% now to full - been on charge since 8am but not being used. It's not 11:40 and it has only got to 72% via a white 2amp block from a Note 2 and s3 cable.
That seems awfully slow, I've been getting charge times under three hours from 10% I'd say, albeit untimed using the supplied PSU/cable.
Thanks for that. It's reminded me that I should be able to use my old iPad plug for faster charging.
I need to locate a car cig lighter plug now that's both 2a and sits fairly flush as mine is annoyingly in the ash tray drawer.
:thumbup:
Mine charges pretty quick using my Anker Astro 2 and an old blackberry cable. As long as it's in the 2a spot. I tried using the 1a and it was still draining while I used it.
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