I was wondering if anyone else was having this issue.
I've charged my Nexus7 overnight on three occasions. Plugging it in before I went to bed (~1AMish) and getting it on my way to work (~8:30AMish). Out of those three times, on two of them, when I went to get my tablet the unit was powered off. I know for a fact that when I plugged it in, it was on, and no one touched it in the meantime.
The most recent occasion was this morning.
On all three occasions, the unit still had 40-50% battery life left.
On two other occasions, I've charged it during the day for a few hours, and it was fine.
Additionally, I've never had the unit turn itself off overnight when it wasn't plugged in. And I'm using the charger/cable that came with it.
Lastly, the first occasion was on the stock kernel/rom, and the second was on the motley kernel (but stock ROM).
So it seems like something is causing the unit to power itself off if it's on the charger for too long. This is concerning, because the only thing I can think of is that it's overheating and shutting down as a protection mechanism.
Any thoughts or ideas?
Plugged mine in for the first time last night at 11:30. Slept till 8, hit the power button and everything was fine.
Basically, no issues here.
Was it fully charged when you switched it back on? I ask because I shut mine down for the overnight charge last night (plugged into a laptop, not the wall - there's only one socket near the bed and my battery-sucking phone gets that juice), and when I woke up it had only gone from ~30% battery to 55%.
phonic said:
I was wondering if anyone else was having this issue.
I've charged my Nexus7 overnight on three occasions. Plugging it in before I went to bed (~1AMish) and getting it on my way to work (~8:30AMish). Out of those three times, on two of them, when I went to get my tablet the unit was powered off. I know for a fact that when I plugged it in, it was on, and no one touched it in the meantime.
The most recent occasion was this morning.
On all three occasions, the unit still had 40-50% battery life left.
On two other occasions, I've charged it during the day for a few hours, and it was fine.
Additionally, I've never had the unit turn itself off overnight when it wasn't plugged in. And I'm using the charger/cable that came with it.
Lastly, the first occasion was on the stock kernel/rom, and the second was on the motley kernel (but stock ROM).
So it seems like something is causing the unit to power itself off if it's on the charger for too long. This is concerning, because the only thing I can think of is that it's overheating and shutting down as a protection mechanism.
Any thoughts or ideas?
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I had this happen to me on the first unit I had... I was actually using stickmount to transfer some data and left the usb adapter plugged in for about an hour and when I picked it back up it was DEAD.... I could not get it to boot up at all until I did the recovery (power/volume) method and then everything was fine but I returned it anyways cause of a defective screen... I am now on my 3rd unit from Sam's Club and I think I might have a keeper...? (Knock on wood) :fingers-crossed:
CrookedKnight said:
Was it fully charged when you switched it back on? I ask because I shut mine down for the overnight charge last night (plugged into a laptop, not the wall - there's only one socket near the bed and my battery-sucking phone gets that juice), and when I woke up it had only gone from ~30% battery to 55%.
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Yes, it was at 100%.
Keep in mind that charging via computer's USB port takes much longer. Maybe your laptop went into sleep mode and shut down power to the USB port?
phonic said:
Yes, it was at 100%.
Keep in mind that charging via computer's USB port takes much longer. Maybe your laptop went into sleep mode and shut down power to the USB port?
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Nope, my fiance's phone was plugged into the same laptop and it was fully charged in the morning. And as a general rule, I've never known the computer to automatically sleep while on AC power, even when the screen is closed.
Thank god i'm not the only one experiencing this. My nexus 7 always seems to turn off after I leave it overnight plugged in for charging. I thought it was a kernel issue but i've switched kernels and i still experience it. Still unsure as to what is causing it.
Same here. Its odd it only seems to be for an extended period of time. Also my battery was indeed fully charged. Should I exchange at Sam's?
Sent from my Nexus 7 using xda premium
There is nothing else wrong with the tablet. I have a feeling it could be some sort of hardcoded feature where if it notices that you're plugged into the wall charger with 100% battery and the tablet is in deep sleep for a certain period of time, it automatically shuts down.
evonc said:
There is nothing else wrong with the tablet. I have a feeling it could be some sort of hardcoded feature where if it notices that you're plugged into the wall charger with 100% battery and the tablet is in deep sleep for a certain period of time, it automatically shuts down.
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Ikr. First time it happened to me I was like wtf? It might to stop the 2 amp charger from overcharging? My unit is fine, I think the sound is just right. I might get that squaretrade warranty though.
Sent from my Nexus 7 using xda premium
Well, I feel a little better that I'm not the only one with this "problem".
The question is, is this a "problem" or a "feature". I guess we won't know unless we ask Google/Asus (good luck getting that answer) or enough people respond saying that it happens to them too. But if people start saying it does not happen to them, it makes it more likely to be a problem....
This happens to my phone due to overheating. The tablet does run hot when charging. See if there's a temperature logging app and run it overnight.
Sent from my LG-P999 using xda app-developers app
It would be nice if it would just cut off the battery charge and run directly on A/C. But I guess I would rather have it power off than explode.
isnt bad to charge it overnight like i believe from 1% to 100% chrge is like almost 3hrs fully chrged.. i just alarm myself for 3hrs to check if its fully chrged already then unplug it
Sent from my Nexus 7 using xda app-developers app
lyrad12 said:
isnt bad to charge it overnight like i believe from 1% to 100% chrge is like almost 3hrs fully chrged.. i just alarm myself for 3hrs to check if its fully chrged already then unplug it
Sent from my Nexus 7 using xda app-developers app
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True, it's not good to constantly charge the battery once it's full.
Most devices however have a built in charger kill switch once it reaches that point. Laptops for example will switch to A/C power and only start recharging the battery once the level drops to ~95%. I believe my phone does this as well (SGS2).
I guess I'm OK with it turning itself off, assuming that it really is a safety feature. My main concern was something was wrong. It would have been nice if they mentioned this in the 100pg Nexus Guide eBook though .
phonic said:
It would have been nice if they mentioned this in the 100pg Nexus Guide eBook though .
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Ikr, such a thick guide
Sent from my Nexus 7 using xda premium
I want to add my own observation -- mine was almost fully charged, I plugged it to my computer's USB, turned the screen off, walked away. A couple hours later, the Nexus 7 was turned off. But I was shocked to find that, pressing the power button couldn't turn it on. The first thought came into my mind was that my computer did not charge the Nexus 7 and the battery ended up completely drained. So, I plugged it to the wall charger, left it on for a day. 1 day later, I tried to turn it on again. No, it didn't work. I was panic and decided to Google about how to reset and checked if I could wipe it and sent it back for a replacement. I found that pressing the power, vol up/down button at the same time can force a reboot. I tried that and bingo, it booted into the bootloader. Before I wiped, I decided to try to boot back to the Android OS. Surprisingly, that worked. I was happy and decided to ignore this incident. Then, today, it happened again. This time, I immediately used the power + vol up/down trick to reboot, and that booted me right back into Jelly Bean. I checked the battery status and it's fully charged, which meant my computer was charging it all along. For some reasons, the Nexus 7 would just turn off itself. And, in my case, pressing the power button alone would not reboot it.
Toys Samurai said:
I found that pressing the power, vol up/down button at the same time can force a reboot. I tried that and bingo, it booted into the bootloader.
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Sounds like to me that it's hard locking, not "powering off", and you're forcing a reboot. Long-press of the Power button should do the same thing.
I can't say I have much to offer in regards to this issue, but am I correct with my observation that everybody experiencing this issue has experienced it while their N7 was plugged into a computer of some sort for an extended period of time? Has anybody had this happen when plugged straight into the wall outlet?
Here's another update with an interesting 'twist' since my last post.
I've charged it twice in the meantime. Once was, again, overnight, and I woke up to find it powered off. A simple "on" press brought it back on.
However, on Saturday, I used it heavily and was down to about 40%, so I plugged it in around 11AM. I meant to grab it around 3PM when I went out, but forgot about it. Got home late, and went to look at it at about 11PM (12 hours later). It was charged to 100%, running off the A/C power, and still on.
This is weird, because if I leave it plugged in "overnight" for 8 hours, it will almost always turn off sometime before I grab it. But when left plugged in during the day for 12 hours, it stayed on. I wonder if it handled the situation different based on the time of the day???
Im having some bad battery problems lately, namely the phone suddenly dying at aprox. 30 percent. sometimes after turning it back on it shows about 15 percent of battery left, then dies again. Fully charging the phone then fully draining it seems not to have solved it til now, I really need some help now! Thanks guys
Sent from my One using Tapatalk 4 Beta
Found this fix online, see if it works.
Option 2: (No Root) Physical Battery Calibration This option is also very simple, but at the same time, a little more time consuming. If you have a rooted device, Option 1 is definitely the way to go. However, if you don’t know what “root” means, stick with Option 2 and go check out the root section of Android Authority.
Turn your phone on and charge it for 8 hours or more.
Unplug the charger.
Turn your phone off and charge it for one hour.
Unplug the charger.
Turn on the phone and wait 2 minutes.
Turn your phone off and charge it for one hour.
Unplug, turn it on and use as normal. Your battery life should now be a lot better.
Hi,
My Xperia T was fine one morning, next time I took it out of my pocket about 2 hours after my last look at it, it was really hot, and it failed to respond to any buttons. I tried the force restart and everything. The battery was at around 40% at my last successful check.
As it wouldn't respond I was obviously forced to leave it alone as I was in work and couldn't plug it into any computers as I didn't have the USB cable with me. About 3 hours later the phone had gone cold, presumably the battery had died?
When I got home, I plugged it into the wall charger and nothing happened. Even the charging LED wouldn't come on.
24 hours later I plugged it into the charger again, and now the charging LED comes on instantly, (where as there was normally a bit of a delay I believe???) only to experience it turning off again 2 minutes later. A further 2 minutes later and the light comes on again and this process repeats. It still doesn't respond to any buttons or combination of buttons.
Any ideas?
Cheers,
Josh
Let it charge at least overnight and then try to boot again
Sent from my LT30p using xda app-developers app
So last night I left it on and battery drain wasn't terrible but I don't think it was good either. So I figured since I'm obviously not using it at night, I should turn the always on display off. Don't need it than so what's the point. Then I decided, why not disconnect it from my phone and than just tap the reconnect button in the morning. Wouldn't be an inconvenience at all either. So I'm sure having the display off will help, but not sure about the disconnecting part but still leaving the watch turned on. Anyway, just wanted to hear what you guys all do with your watch at night while you're not using it.
Mine sits on the charger. I don't turn it off or disconnect it from phone. When I wake up, it is fully charged.
Sent from my SM-T800 using Tapatalk
I turn the always on display to off and turn flight mode on. However, it would be great if there was a scheduler that did it automagically.
Sent from my SM-G900F using Tapatalk
To get the best battery life out of this thing is to charge it at night... Or else you might get oit of juice before the day is over depending on how much notifications you get...
Sent from my SM-G900W8 using Tapatalk
I power the device off and plug it into a charger
notsointeresting said:
I power the device off and plug it into a charger
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+1
thanks for all the responses. I guess I can just make it a habit of plugging it in at night along with my phone. And if not, definitely turning the screen off and placing it into airplane mode. Cause the watch charges in 2 hours and like 10 min. Tried it out yesterday so it's pretty quick.
Mine easily lasts two days, really only on charge when battery is nearly dead. Sometimes on charge if I decide I'm not going to be wearing it for a bit and there is a charge close by. Takes no time to fully charge and uses even less battery just sitting connected than wearing it while wrist action setting is on
I remember have selected an option so the battery wouldn't necessarily shut off at 0%. Now my phone shuts off at approximately 4%. Anyone remember where this option is?
Sent from my Turbo
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I recently noticed this as well and would be interested if there's a way to fix this.
It has happened to me, too. Yesterday my phone shut down at 25% and 14%, but after turning it on again I could use it normally.
I'm, obviously, also interested if there's a solution for this.
Mine has done the same thing a couple of times. It's only ever happened once the battery is less than 10% but it's still annoying. I also had one random reboot today but that was the only time that this has happened.
I could swear I had selected an option for this...but I can't find it anywhere. Does anyone recall having seen this??
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videtonator said:
It has happened to me, too. Yesterday my phone shut down at 25% and 14%, but after turning it on again I could use it normally.
I'm, obviously, also interested if there's a solution for this.
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I had some weirdness with this myself yesterday (my 2nd day on the phone).. I was literally laying in bed before going to sleep, marveling at my battery life after a day of heavy use (18 hours and 39% to go, SOT 3 hours) and it just shut off. I tried to turn it back on, but got the boot loader's big fat 0% screen. So I plugged into the turbo charger, and then it said 100% within a minute, I turned it back on, and then it was 85%.. Just decided to go to bed, left it plugged in all night. Took it off the charger this morning at 100%.. then over the next 2 hours it fell down to 55%. Figured the battery just needed to settle in for a couple of days. I've had it on a USB port for about 90 minutes now, and it's back to 100%. I'm going to take it off an constantly keep it between 80-100% all day. Hopefully it just needs to settle in and get some battery stats under it's belt? I've not seen this with many, or any phones before. Would suck to be out somewhere thinking I can make it to the next morning no problem, and then have my phone die 5 minutes later and I don't have a charger.
Has anyone found a solution for this issue?
i am with the same "4%" issue
It probably does that so it can already have a headstart for the turbo charging feature.
Have you guys tried re-calibrating the battery? I've experienced versions of what you describe, and here's how I fixed it on mine;
1 - plug into the turbo charger that came with it
2 - press and hold power button till unit shuts off, continue holding,
3 - continue holding till you see a battery icon on the screen, let go of the power button
4 - phone will vibrate, and a couple seconds later, the battery icon will show a % number, that is the correct level of charge in the battery, it is now re-calibrated!
5 - press and hold power button till phone starts to boot, you should be good..
From what I've read, this "out of sync" battery calibration is caused by using certain chargers other than the stock one. I saw it happen from plugging into a laptop usb3 port and an old blackberry wall wart (don't judge me). Other people have reported it from using wireless charging (I wireless charge every night without issue).
Hope this helps, good luck!