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Root Battery problems

S

Sylon

Well-Known Member
Recently, like within the last month or two, the battery in my rooted Nook Color (running CM7 RC7.1) has been downright awful. If I don't touch the Nook, it'll last about 3 days. If I use it, even a little bit, the battery power drops like a rock. I can literally watch the battery meter drop and drop and drop like a car with single digit gas mileage on full tilt. Also, the Nook shuts down if the battery power is below 40% and won't turn back on.

The battery power used to be incredible. I mean, hanging up there with my iPad (thats right I have one of those too). Right now, I am overclocking my Nook Color at 1.1GHz. Now, before blaming that, I tried reducing the clock back to normal, 800MHz, still the same battery issue. When I installed RC7.1, I had a full battery, and that was back when 7.1 came out. I haven't needed to install any OS since. No nightlies, just been sticking with what works.
 
Nothing wrong with that, governor? Set to conservative (or on demand)? (Not performance.)

When you check battery use, what are the top 7? Settings... battery use (I believe)

You might want to fully charge your NC, calibrate your battery, run it dead, then charge completely. There's a number of apps in Market to do that, Battery Calibration is one.

If you go to settings... apps... running, see anything there you installed, but never use? Might want to uninstall those.
 
A simple test is to create a bootable CM card then run that for a period and compare. If it suffers the same miserable battery life, then it's your device. If not, there's something about your config.

If it's your config, use spare parts to check for wakelock usage and see if something's keeping it on when it should be sleeping Use CPU Spy to see if it's entering deep sleep state at all. Those may point to a software culprit.

Why it only drops when you're looking at it, I'm not sure.
 
colchiro said:
Nothing wrong with that, governor? Set to conservative (or on demand)? (Not performance.)

When you check battery use, what are the top 7? Settings... battery use (I believe)

You might want to fully charge your NC, calibrate your battery, run it dead, then charge completely. There's a number of apps in Market to do that, Battery Calibration is one.

If you go to settings... apps... running, see anything there you installed, but never use? Might want to uninstall those.
Click to expand...


I'm trying the battery calibration thing. I don't have a whole lot consuming the battery. I don't have my Nook with me at the moment, but the only app thats running are normal functions and Tapatalk, oddly. Twitter was the only other app I installed, do you think that's doing it?
 
See what happens after the calibration. You might have a bum battery.

Twitter's installed with CM7. I prefer Tweetcaster to follow some Android devs, but maybe your Twitter's updating too often?
 
Yeah I'll let you know how the battery is doing once it is fully drained and recharged again.

I also checked the Twitter app, it was set to auto-sync and the interval was way too often. I turned the auto-sync off since my phone does the same thing. No need for 2 devices checking twitter all the time. We'll see if that also helps any.

I hope I don't have a bad battery. That would be my luck though.
 
At 54% from the original charge after the first battery calibration. So far so good, its actually taking effort to kill the battery now, and that's a great thing. I still want to run it dead to see if it still shuts off when it dips below 40% like it did before.
 
The test will be what it shuts off at AFTER this one.

This one tells your NC the current battery capacity. The next one should use it. :D
 
A new problem that has surfaced is the ADW Launcher keeps crashing. I mean, every 2-3 minutes it'll freeze up, crash, restart. Rise, repeat. Making it pretty tough to use the Nook. Battery is at 44% now, gonna keep running it dead though.
 
It should take a couple minutes to run. I prefer doing it from recovery, but if it only takes a couple seconds, it didn't do anything. :D
 
Last night the battery finally died after a few days of constant work off a single charge after the calibration. I recharged it last night and this morning, when the battery was full, unplugged it.

Due to things going on today, I didn't check it until this evening after the Super Bowl. It was frozen with the screen off. After a hard reset, the battery is showing 32%, after not touching it all day. Something is definitely not right with this thing.
 
Your NC isn't the only one that's depressed after that Super Bowl!

That sounds like a common Sleep of Death hang. It will either crash and turn off, or leave the screen dark but still powered up (which will eat battery all day). A lot of folks swear the SoD is due to background wireless when off.

When running CM on mine, I had very stable performance using the CM7.2 RC0 Mirage version, which included a lot of fixes that didn't make it into the final release of CM7 before the big freeze. If you check that XDA thread, there is still some active tweaking being done to tide us over until ICS shows up with CM 9.
 
I am growing tired of these issues that all of a sudden appeared on this Nook. From the battery problems to the launcher crashing every 2 seconds. Thinking about going with a dedicated 7" tablet, maybe the Iconia A100 or something.
 
I think it's time to create a backup in recovery, upgrade to the latest stable version (7.1 stable), then factory reset to see if it fixes any issues. If it doesn't fix your issues, you can always restore your backup.
 
I'm running RC7.1 right now, and have been since it came out. The thing that's baffling me is that it just started doing this, for no reason. It might be worth just starting over, but I really don't want to go thru the ass pain of all that again. Besides, what says that when I restore everything that I won't be restoring the problem back onto it?
 
If you restore your backup YES, the problem will return b/c nothing has changed.

But, if you backup your rom in recovery, and apps with Titanium Backup, then factory reset. When asked if you want Google to backup & restore your settings, say NO. This prevents all your apps installing from Market again. Install TIBU and install just apps + app data for a couple apps for testing. See how battery life is. If it hasn't changed, then restore your backup. If it's better continue to work with it, creating another backup before making major changes.
 
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