Hey guys, I have a weird issue. Regardless what ROM I am on, my battery percentage will randomly drop like 10%
Randomly, I will be using it, I'll be at 70%, then it will just drop to 60%, normal use. Been happening a lot more recently.
Is this a sign of a battery going bad? I've had this phone roughly a year (Stock battery).
Thanks!
What does your battery life look like? A battery's performance WILL degrade over time, but if your battery life is still good enough for you, I don't see any harm in continuing to use it.
You could get an app like Battery Monitor Widget. It will keep track of usage and calculate the health of the battery. You can also try wiping battery stats (the app can do that too), it could just be the phone mis-reading the battery...
Related
Well, this is not an issue, but i discover yesterday.
My battery performs well, as good as in my Hermes. I need to charge every night, cause i have BT active all the time, and push mail over 3G.
Yesterday the battery was at 70% charge. I take out the battery, and after one minute, i put on again. Switch on the PDA and the battery says 72%.
I test again, with 40%, and same result. Take out the battery makes 2-3% higher charge.
This takes me to think the method Kaiser calculate the battery remainig is not so fine. Is true that is better that Hermes, but perhaps the battery temperature causes the driver to show incorrect values.
So think you have 2-3% more battery that the value it shows.
Anyone can verify this in his Kaiser and post the gained battery?
Cheers.
I think the reality is that trying to gauge battery life of a Li-Poly battery down a single percentage point is simply difficult. Their voltage drop is not very steep, so the voltage differential between 70% and 73% is not going to be very much. On top of that, it is very common for batteries to gain a little voltage if left without load for a bit. You can see it with a flashlight... run it down until it's essentially dead, then turn it off for a bit. When you turn it back on, it suddenly has some life left that didn't appear to be there before.
I test with 83%. Take out the battery makes 87%.
I recently installed Serendipity and made sure the battery was at 100% while doing so (and deleted the battery file). I'm waiting for the battery to drain before I plug it in. Am i supposed to let it charge all the way again? Also, is it safe to reboot the phone while it is draining the first time? I want to install something using clockwork.
I'm being careful about this because cognition would report 14% battery life after 33 minutes of display usage and display eating up 96% of my battery....
killsto said:
I recently installed Serendipity and made sure the battery was at 100% while doing so (and deleted the battery file). I'm waiting for the battery to drain before I plug it in. Am i supposed to let it charge all the way again? Also, is it safe to reboot the phone while it is draining the first time? I want to install something using clockwork.
I'm being careful about this because cognition would report 14% battery life after 33 minutes of display usage and display eating up 96% of my battery....
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Click to collapse
There's a complete thread on this, I suggest you look it up.
After you reset your battery stats, it is suggested to do a few full battery circle (use til dead, full charge, rince and repeat). You should be fine after 2-3 circles.
Note tho that it will not improve your battery life. All it does is a attempt to tell your phone what % your battery life is exactly.
For your fast drain, I don't think it has anything to do with your battery calibration or your ROM. It's most likely a app (or a few) that are draining alot of juice or that are running w/o realy being needed. (Check your running services.. make sure you know which one to stop and not to***)
Also using a app/widget like advanced task killer can help your battery life as it will stop every app running with a simple touch. I suggest doing it anything you're not using your phone.
One last thing, display eating 96% of your battery is normal.. it's not telling you it's using 96% of your battery. It's telling you that during the time your phone as been unplugged, your display use was your main action.. probably cause you didn't make many calls or anything else.. Display is just about everything you do with your phone so it will always have some high numbers like that.
BWolf56 said:
There's a complete thread on this, I suggest you look it up.
After you reset your battery stats, it is suggested to do a few full battery circle (use til dead, full charge, rince and repeat). You should be fine after 2-3 circles.
Note tho that it will not improve your battery life. All it does is a attempt to tell your phone what % your battery life is exactly.
For your fast drain, I don't think it has anything to do with your battery calibration or your ROM. It's most likely a app (or a few) that are draining alot of juice or that are running w/o realy being needed. (Check your running services.. make sure you know which one to stop and not to***)
Also using a app/widget like advanced task killer can help your battery life as it will stop every app running with a simple touch. I suggest doing it anything you're not using your phone.
One last thing, display eating 96% of your battery is normal.. it's not telling you it's using 96% of your battery. It's telling you that during the time your phone as been unplugged, your display use was your main action.. probably cause you didn't make many calls or anything else.. Display is just about everything you do with your phone so it will always have some high numbers like that.
Click to expand...
Click to collapse
Yeah, I've seen the thread before but forgot about it. Thanks for reminding me. And my point about the display was that it was on for such a short amount of time, yet still killing my battery.
I am now down to 30% or so after 3 hours or more of display time after calibration & rom switch- and I was streaming music through WiFi and using Bluetooth headphones. So it it seems like it made a huge difference =D
Thanks
Hey all,
I have had terrible misfortune in the realm of battery stats. Ever since CM7 (and maybe even before) my phone is unable to figure out how much battery is left. Here is a common scenario:
Charge phone overnight, use phone throughout day, battery dies after 6-7 hours of moderate-heavy usage. I plug it in, reboot, and then it reports ~60% battery left.
Another common scenario is that it will dwindle around 5% battery or less and go up and down until it finally dies.
I know that this is a misreading of the battery and not battery drain or a rogue app because when I flash a new ROM the battery life is amazing for 1 day. The day after I flashed Team Hacksung's ICS rom, I got almost 17 hours of battery life with 2.75 hours of the display being on and 30 minutes of Google Music. I was blown away! But even then it was dwindling around 5% not knowing when it would actually run out. The day after, it was back to its old tricks of misreporting the battery percentage.
Today I charged it to 100%, unplugged it, and shut it off. Then I plugged it in while it was off and let it charge to 100% again and wiped battery stats in Clockwork mod. I'm getting ok-ish battery with that, but it's not even close to how good it was when I first flashed ICS.
Anyone have any ideas what I could try?
Thanks!
When you wiped the battery stats did you let the battery fully discharge and shut off before charging again?
After wiping battery stats it is recommended to let the phone fully discharge to the point where it will automatically shut off.
Keep in mind with the age of our phones, it could just mean your battery is dying. Try the above method, but in my experience uncalibrated battery only last a few days. The phone will "fix" it by itself the longer you use it.
j.curtis.369 said:
When you wiped the battery stats did you let the battery fully discharge and shut off before charging again?
After wiping battery stats it is recommended to let the phone fully discharge to the point where it will automatically shut off.
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Click to collapse
That's what I'm doing currently. Battery life seems improved, but we'll see what happens. It's nearing death now, ~6%. At this point it will probably misreport it for a few hours until it finally dies. I left it unplugged overnight, so now it's at 19.5 hours uptime with 1.75 hours display time.
Definitely improving! I hope that it successfully recalibrates.
Battery stats have nothing to do with how the os calculates remaining battery...they are what is displayed in settings>about phone> battery use and are reset each time you charge to full.
You're just giving it a good bump charge...wiping the stats is just a placebo effect.
studacris said:
Battery stats have nothing to do with how the os calculates remaining battery...they are what is displayed in settings>about phone> battery use and are reset each time you charge to full.
You're just giving it a good bump charge...wiping the stats is just a placebo effect.
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Click to collapse
Seriously? Wow I didn't know that. Is there a way to actually reset how the OS calculates the battery?
Does this app do anything?
https://market.android.com/details?...xLDEsImNvbS5uZW1hLmJhdHRlcnljYWxpYnJhdGlvbiJd
Nope...that app is just perpetuating the myth of what the batterystats.bin file does.
Don't hate me for this but, Then how come Roms usually give me better battery life after a full cycle? not bump charging or deleting battery.bin just running it?
Because the system for tracking the remaining power is getting to know your battery. once it gets a feel for it, it's more accurate. In theory anyway
So the "give it a day" is still true, at least in theory?
Sure
10 char
battery gauge temporarily fixed by removal and replacement of battery
Ever since I rooted my phone, I've noticed that the battery gauge/meter is way off. I keep an eye on the charging voltage and try to pull the plug around 3.92 volts. Problem is, the gauge is always reading low until I pull the battery, wait a few minutes, and then reinsert and boot up. Then it's fine for a while, but I notice it creeping down even though I keep topping it off with a charge to keep it around 3.92 volts.
What's going on? Do I have to fully deplete the battery and charge to full to have an accurate (or somewhat accurate) battery gauge? Do I have a bad battery (this battery has been used only a couple months)? Is something else going on here? Recommendations, studacris? Doesn't the os use battery voltage to calculate state of charge (%)?
I got a full stock N7 16GB 4.2 OTA which I'm not planning to root or flash (that's what my One X is for =P).
I noticed that quite often if I leave my N7 for a night with about 40% battery life, in the morning it will fully shut down with about 14% battery life remaining. Checking battery usage I see a sharp, almost vertical drop. Something's destroying battery when it gets about half way.
Anybody else had this issue?
Screenshot attached.
Try and fully discharge and charge it a couple of times. The battery may be poorly calibrated. U can use a battery drainer if you are impatient. https://play.google.com/store/search?q=battery+drainer&c=apps
DarkDvr said:
I got a full stock N7 16GB 4.2 OTA which I'm not planning to root or flash (that's what my One X is for =P).
I noticed that quite often if I leave my N7 for a night with about 40% battery life, in the morning it will fully shut down with about 14% battery life remaining. Checking battery usage I see a sharp, almost vertical drop. Something's destroying battery when it gets about half way.
Anybody else had this issue?
Screenshot attached.
Click to expand...
Click to collapse
I don't know which update it was put in but it seems Google have added something that shuts down the N7 automatically at 20% to save the battery. I don't know if this is for every unit or not but it's been doing it for me and a few friends who have them too. I guess this is to save the battery as it can affect the recharging efficiency and the battery will die faster than normal if you allow it to drain further.
From your picture it looks like it's doing as it should, shutting down at about 20%, and then guestimating the battery stats, which fools the reading. However dropping from 40% to 20% overnight sounds like you have one or more rogue apps installed causing some serious drain, unless it's something you know/want to be running of course.
Droid 4 running Eclipse.
I've noticed that after charging my phone to 100% and going throughout the day, battery life is amazing. I get wonderful stats; I can go 12+ hours (and then some) on a single charge.
However, the issue occurs when my phone starts to drop into the near-dead area. When my phone reached 10%, I usually start easing up on data usage, leaving the screen on, and so forth. But the real problem is that I can be using it when it's (supposedly) about to die, and literally WATCH the battery meter drop to 1%. And it will remain at 1% battery for anything from an hour to four, depending on how I use it.
I'm lost as to what I can do. There are no options in Safestrap 3 to sipe battery stats, so I had to resort to a Market app to wipe the 'batterystats.bin' file. Even then, the app that wipes that file shows the battery at over 3000 mAh of juice... yet this device only has a 1785mAh battery.
So I'm confused. I want to make sure that it's reading proper battery levels, and I want to bring it back to where it should be.
Does anyone have any suggestions? I'm not sure what else to try.
Just saw this too! Was worried about battery life, as it dropped from 100% -> 10% in about 8 hours, but then stayed there for many many hours.
I just got the phone, so did calibrating the battery help with your one?