So my battery is at 56%, I hook it upto the charger it's been on the charger for a good 2 hours now. I unhook it and my battery suddenly is at 30%...
Also I've noticed that my device gets hot, not burn your hands hot but noticably warm hot.
Should I be worried? Could there be a short somewhere, the device is just 3 days old.
was your wfi turned on during charging?
Yes it was
that sounds really bad especially since it didn't charge
did the light come on? you might want to consider getting an exchange
Yes the light did come on and the charging symbol did apear on the screen.
If wifi is turned on and set to best performance, and if you have backlight set to remain on when connected to external power, your device will drain more power that charge.
that will explain your battery/charge/heat issue
Actually I can confirm this shouldn't be true. I turned WiFi on, turned my brightness to maximum and always on. In about 10 minutes I went from 52% to 54%.
I was using the wall adapter to charge it. USB charging might be too slow to replenish that kind of drain.
definately exchange
you don't want it to blow up
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I dont know why, it just happened now.
My 9100 is getting really hot while charging.
Wifi on and charging while playing MP3s.
Is that normal??
Turn the wifi off and it won't get as hot. The reason is because with wifi on the device as a whole draws more current to charge the battery and power the wifi at the same time.
when my battery dies, i plug the phone in the charger, and continue to use it.. after a while itll just turn off, is this normal? any thoughts?
I would imagine that even though it's plugged in the phone still uses the battery, which would cause the phone to turn off. Plus, I don't think that is very good for the battery. You should look into getting a spare and an external charger.
I'm always paranoid about overheating my batteries so I completely turn off my N1 while I am charging it since it charges quicker and doesn't get as hot.
I find that if I go all the way down to zero it won't turn on when you charge it for about a minute. I think it just makes sure it has enough power to do a safe shutdown before it lets you turn it back on.
turns off showing you 0% battery?
In this case you're overheating the battery and probably caused some damage to it by now, reducing its capacity and lifespan.
turns off when you leave it unused? Just check your "screen timeout when plugged" setting.
Ok so my phone will not charge over 60%. Anyone else having a problem? Going to go back to AT&T and swap batteries to see if it changes anything.
Is there a way to clear the battery memory? I have tried to run it all the way down, then back up but it hasnt changed anything.
Mine wont turn on unless its above 5%, even if plugged in to the wall. I thought it was a brick, doesnt look like it charges well while powered on.
Mine wouldn't charge past 50% most of yesterday. I plugged it in to the wall for a few hours and left it alone. I returned and it had started charging. It also charges very slowly for me over USB.
nowise said:
Mine wouldn't charge past 50% most of yesterday. I plugged it in to the wall for a few hours and left it alone. I returned and it had started charging. It also charges very slowly for me over USB.
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Dont use the phone while its charging.. it will take forever.
I wonder if the charger can't supply enough juice to the battery.
It does have the biggest battery of any current cell phone.
Has anyone with these issues actually charged the phone while it was off?
I fully charged the phone powered off as soon as I opened the package and I havent had a problem charging at all..
I wonder if anyone knows what apps are active and syncing in the background when the screen is blank? On my previous myTouch 4G (not-so dearly departed), I would start the day with a fully charged battery. For an experiment, I did not use the phone all day until 5pm. When I unlocked it at 5, I had 30% charge left. So where did it go?
I had power saving on, and all social network updates turned off.
I'm on the latest cm nightly,
I always let my tablet die before charging but this time something odd happened. When I would plug it in the white battery that shows its charging would come on then turn off. If I unplugged and plugged in again the exact same thing would happen.
While plugged in I would try booting up. It would get to the lock screen then power down because it had zero percent charge.
I figured out if I just kept unplugging it and plugging it in again and again after the the screen turned off while the white battery was showing it would charge some, boot and stay on charging correctly.
This is the first time this has happened....
Sent from my Nexus 7 using xda app-developers app
Sort of reading between the lines here, and I've only had my N7 for about a month now...
... but mine has never shown the battery display continuously when it is shut off but chanrging on the AC adapter. It comes on for a little while, and then shuts off - but the unit is still charging so far as I know.
Mine was sitting at 59% right now, so I shut it down, waited 30 seconds, and plugged it into the charger. The black and white screen shows up, changes once or twice, and the screen goes dark after about 13 seconds.
I don't take that to mean that it is not charging - it takes some juice to keep the screen lit, so the battery will charge faster if the screen is not lit.
I guess I usually leave it booted while charging, but I can certainly shut it off and verify that it is indeed charging without showing something on the display.
I think it is a bad idea to run your battery all the way down. Li-Polymer batteries do not exhibit memory from partial charging... but they DO have a safety circuit that disables charging if the battery voltage goes too low. You are not gaining anything by running it all the way down, but are risking the possibility that the safety circuit will flip and permanently prevent the battery from charging. (The low-voltage trip circuit is there to prevent chargers from attempting to charge a battery that has a short - that would be a fire hazard).
cheers
[ Edit ] I powered my N7 off at 50% battery, plugged it in & let it sit for 40min, and then booted it - charge now at 74%. The charging indication on the screen was only on for the first 15 sec. Dunno if you are saying something different - but I don't think the charging indication is supposed to stay continuously on while charging. Too bad the N7 doesn't have a small LED for this purpose.
bftb0 said:
Sort of reading between the lines here, and I've only had my N7 for about a month now...
... but mine has never shown the battery display continuously when it is shut off but chanrging on the AC adapter. It comes on for a little while, and then shuts off - but the unit is still charging so far as I know.
Mine was sitting at 59% right now, so I shut it down, waited 30 seconds, and plugged it into the charger. The black and white screen shows up, changes once or twice, and the screen goes dark after about 13 seconds.
I don't take that to mean that it is not charging - it takes some juice to keep the screen lit, so the battery will charge faster if the screen is not lit.
I guess I usually leave it booted while charging, but I can certainly shut it off and verify that it is indeed charging without showing something on the display.
I think it is a bad idea to run your battery all the way down. Li-Polymer batteries do not exhibit memory from partial charging... but they DO have a safety circuit that disables charging if the battery voltage goes too low. You are not gaining anything by running it all the way down, but are risking the possibility that the safety circuit will flip and permanently prevent the battery from charging. (The low-voltage trip circuit is there to prevent chargers from attempting to charge a battery that has a short - that would be a fire hazard).
cheers
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Hm. I remember the screen always staying on when charging when powered off. But that could be just bad memory.
I still don't understand why it would power down after it booted up connected to my charger. (this is after leaving it plugged in for about 5 minutes turned off)
Sent from my EVO using xda app-developers app
All about charging Li-ion batteries. Li-ions are different than 'regular' batteries. Full changes and discharges is not the best for your battery.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Sent from my N7 using XDA Premium
Dirty AOKP 3.5 <&> m-kernel+ a35 (t11)
ezas said:
All about charging Li-ion batteries. Li-ions are different than 'regular' batteries. Full changes and discharges is not the best for your battery.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Sent from my N7 using XDA Premium
Dirty AOKP 3.5 <&> m-kernel+ a35 (t11)
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pretty much all modern electronics don't allow a full charge or discharge.
Hello, it has been happening to me for last 2 days that when I put the phone on charger, the battery sometimes charges at an extremely slow rate (14% to 23% in 1.5 hrs), and sometimes it even discharges while the charger is connected. I am attaching the battery screen here.
You can see that first it goes down from 100 during morning to evening. This is normal behavior owing to my usage. Then I charged it and up goes the curve with a high angle because I use a good charger. This is also fine. Then I disconnect and heavily use the phone again and then put the phone on charger overnight. This is where the problem starts!
Now you see, first of all the battery starts going up then it suddenly starts dropping while still on charger. I woke up to find 23% battery after charging overnight. I noticed in the screenshot that my phone was constantly waking up all night long, may be this could have been the problem. So I connected it to charger again to see the battery level rising in front of my eyes. But again, after 3 hours I found that my battery is 51% and the curve has started to fall down again, and this time there were not enough wakeups.wakelocks.
I am using a powerful charger. It is made in china but it charges all the phones in my home perfectly. I also tried on another charger (also probably china) with the same results on my phone only.
I am using the stock rom, unrooted (can't root version 182.*.*.*)
Do you have thinks running in the background while you charge? Mines charges a lot faster if I turn off internet, kill background apps.
Also is it overheating while chsrgeing? You get a better charge if the phone stays cool
And third your phone might think the charger is a computer. I say this because mines charges really sloe when I connect it to a computer, like 12% per hour. Try a third charger, diffrent brand and wattage compared to the ones yoive tried. it might help.
yes there are background apps but there hasn't been a change which triggered this. the background have worked fine before.
no overheating issue. in fact, this device always feels cooler.
I've always used this charger, my whole family uses it without any issue but now the problem just started happening to me. and even with me the problem is not constant. I just charged up to 50% without any problem. there is one thing left to try. that is, I should try to restart in safe mode and try charging in that mode. if that works fine then it's definitely an app, otherwise the issue may be bigger.