Misreporting Battery?

[theleagueofstream]

I recently switched over from CM10.1 to LN14.1 and have been getting misreported battery (it worked fine previously) Specifically, it will drop 15-20% every 10 minutes or so, and stay at 1% for several hours (I've recorded up to ten hours).

What I've tried to fix the issue:

• Draining to 0% and recharging to 100% (i.e. manual calibration listed on XDA) on LN14 builds
• Battery Calibration Apps recommended on XDA
• Flashing down to stock ROM, factory resetting, and re-flashing 14.1 (I read this could restore a battery file that has been affected by repeated flashing of ROMs.)
• Flashing back down to CM10.1 and CM10.2 (also tried CM11 and CM12 builds) that I used previously
• Wiping DALVIK/Cache between each install
• Battery Monitoring Apps (Rooted)
• Battery saving/hibernation apps
• Adjusting nearly every power consumption option (screen brightness, WiFi, etc.)

The behavior has been the same switching between any ROM of CM, LN, Stock/Factory Reset from the point that I first upgraded from CM10 to LN14.

I don't think it's a lack a capacity and it has to do with misreporting.

I haven't tried recalibrating/draining on CM10 or stock, but I don't know if that would be pointless since I've attempted it three times on LN14 with no success. Also, I don't know if the process causes battery issues long-term. Right now, I'm looking to see if TWRP reports the same battery level as LN14. Last night, I was at 1% for 10 hours or so, including ~3 hours of video trying to discharge.

Anyone have any tips on where to look next? Is this just an issue with LN on HD+ in general? Thanks in advance for any help.

 

[nmyshkin]

Probably one of your sources of information is this post: https://forum.xda-developers.com/nook-hd/help/nook-hd-battery-issue-custom-rom-fixes-t3389721

We suffered through this issue with an HD for quite awhile and tried all the stuff you mention. It may be that the return to stock/factory reset actually worked but it may also be that we discovered that somehow the SD card we were using for flashing (and which we had remade at some point) had not been properly configured as 0x0c and was instead 0x0b. This eventually led to a tablet that would only boot when plugged in and allowed to sit for a minute before being unplugged. We never got to the battery misbehaving issue at that point because of the panic that ensued over what the %#W% was going on!

Anyway.....once the card was made properly, we started from stock/factory reset (including actually re-registering the tablet with B&N, etc.) and then flashed the CM ROMs. Everything is now fine.

Whew.

 

[theleagueofstream]

Probably one of your sources of information is this post: https://forum.xda-developers.com/nook-hd/help/nook-hd-battery-issue-custom-rom-fixes-t3389721

We suffered through this issue with an HD for quite awhile and tried all the stuff you mention. It may be that the return to stock/factory reset actually worked but it may also be that we discovered that somehow the SD card we were using for flashing (and which we had remade at some point) had not been properly configured as 0x0c and was instead 0x0b. This eventually led to a tablet that would only boot when plugged in and allowed to sit for a minute before being unplugged. We never got to the battery misbehaving issue at that point because of the panic that ensued over what the %#W% was going on!

Anyway.....once the card was made properly, we started from stock/factory reset (including actually re-registering the tablet with B&N, etc.) and then flashed the CM ROMs. Everything is now fine.

Whew.

I checked my SD card and the Partition ID is 0x0b. However, my tablet doesn't have the behavior you described regarding the need to be plugged in to boot.

Are you indicating that it would be worth flashing back down to 2.1.0 Stock ROM/Factory Reset with a 0x0c card, and Registering to attempt to resolve the issue? Would I be required to remain on stock for a period of time or can I re-flash to LN immediately? Thanks in advance for you help, the Partition ID type is news to me.

 

[nmyshkin]

I checked my SD card and the Partition ID is 0x0b. However, my tablet doesn't have the behavior you described regarding the need to be plugged in to boot.

Are you indicating that it would be worth flashing back down to 2.1.0 Stock ROM/Factory Reset with a 0x0c card, and Registering to attempt to resolve the issue? Would I be required to remain on stock for a period of time or can I re-flash to LN immediately? Thanks in advance for you help, the Partition ID type is news to me.

I'm no expert so my information is anecdotal. I'd never seen the weird behavior like on the HD tablet in all my work with an old Nook Tablet. And I can't pinpoint the battery reporting issue vs. the improper remake of the card. All I know is that at some point I thought there must be something wrong somewhere and decided to make a completely new card. Then the "fun" really began.

The actual correct Partition ID type is 0x0C FAT32 LBA (as shown by Minitool Partition Wizard). This is documented in all (most?) of the instructions for preparing SD cards. I just got sloppy, I guess. It's still difficult to believe that this change made the difference but it did for me, at least in terms of boot. I do think the return to stock is a good idea. It may not be necessary to register (we already had an account from the old days of running stock), but I would do the factory reset and let it sit awhile as the OP suggested (maybe 15 min?). As he said, what's a few minutes if it will save you endless headaches? What do you have to lose?

When I (carefully) prepared my new SD card I used the files provided by @belfastraven, substituting the old version of CWM needed to reflash stock for the one he had. This gave me SD-based TWRP (two different versions) as well as the old CWM. For the life of me I can't relocate that post, but I expect other card recipes will work.

Edit: here we go: https://forum.xda-developers.com/showpost.php?p=66086179&postcount=10

 

[theleagueofstream]

I'm no expert so my information is anecdotal. I'd never seen the weird behavior like on the HD tablet in all my work with an old Nook Tablet. And I can't pinpoint the battery reporting issue vs. the improper remake of the card. All I know is that at some point I thought there must be something wrong somewhere and decided to make a completely new card. Then the "fun" really began.

The actual correct Partition ID type is 0x0C FAT32 LBA (as shown by Minitool Partition Wizard). This is documented in all (most?) of the instructions for preparing SD cards. I just got sloppy, I guess. It's still difficult to believe that this change made the difference but it did for me, at least in terms of boot. I do think the return to stock is a good idea. It may not be necessary to register (we already had an account from the old days of running stock), but I would do the factory reset and let it sit awhile as the OP suggested (maybe 15 min?). As he said, what's a few minutes if it will save you endless headaches? What do you have to lose?

When I (carefully) prepared my new SD card I used the files provided by @belfastraven, substituting the old version of CWM needed to reflash stock for the one he had. This gave me SD-based TWRP (two different versions) as well as the old CWM. For the life of me I can't relocate that post, but I expect other card recipes will work.

Edit: here we go: https://forum.xda-developers.com/showpost.php?p=66086179&postcount=10

I just flashed down to stock, factory reset and reinstalled 14.1 I set the SD to 0x0C FAT32 LBA. I didn't wait 15 minutes after installing the stock though, just a few minutes (I missed this step and hopefully it doesn't make all the difference.) I'll report the results on usage.

I flashed down to stock with NookHDplus-bootable-CWM-6028-for-stock-BOOTFILES-r4-(05.15.13) posted in a CM10 thread though.

 

[theleagueofstream]

The early indication is that the issue is still the same. I think I'm fighting a losing battle and I'll have to look into replacing the battery or making a regular habit of keeping the tablet plugged in.

 

[ST Dog]

to open the device and/or replace the battery, but it doesn't seem like the device is made for it.

Like most Android devices, not it's not made to be opened up.

But it's doable with care. If you search you can find instructions and videos.

But, 1, I'm non convinced it's a bad battery. You get too much runtime at 1%
And 2, not sure of any good options for replacement batteries. That's why my wife's HD+ doesn't gave a new battery.

 

[theleagueofstream]

Like most Android devices, not it's not made to be opened up.

But it's doable with care. If you search you can find instructions and videos.

But, 1, I'm non convinced it's a bad battery. You get too much runtime at 1%
And 2, not sure of any good options for replacement batteries. That's why my wife's HD+ doesn't gave a new battery.

I'm considering opening it just for the sake of seeing if there's a bad connection, but I've seen people damaging the case, etc. I agree with your sentiment that the capacity doesn't indicate it's a bad battery. Regardless, I'm grateful for everyone's help here so far.

 

[ST Dog]

but I've seen people damaging the case, etc.

Some people just shouldn't work on finiky stuff. I;ve seen people screw up lots of things because they rushed.

Phones and tablets just require time and patience.

 

[theleagueofstream]

Some people just shouldn't work on finiky stuff. I;ve seen people screw up lots of things because they rushed.

Phones and tablets just require time and patience.

I'm assuming you've opened a few, so do you recommend a special set of tools? Or is a guitar pick and appropriate screwdriver enough?

 

[ST Dog]

I'm assuming you've opened a few, so do you recommend a special set of tools? Or is a guitar pick and appropriate screwdriver enough?

Not sure on these.

I've got a few plastic spludgers that have been handy with other devices.

This one makes it look easy, but the tape on the bezel is missing.
https://youtu.be/1muVOrhORq8

Also they don't even tape the replacement battery to the back so it might shift around in the case.

This is more like what you'll encounter.
https://youtu.be/HpVrds3g-M8

Note all the double sided tape. You'll​ want to preserve it replace it.

 

[theleagueofstream]

Not sure on these.

I've got a few plastic spludgers that have been handy with other devices.

This one makes it look easy, but the tape on the bezel is missing.
https://youtu.be/1muVOrhORq8

Also they don't even tape the replacement battery to the back so it might shift around in the case.

This is more like what you'll encounter.
https://youtu.be/HpVrds3g-M8

Note all the double sided tape. You'll​ want to preserve it replace it.

Do you have any suggestions for a replacement brand?

I found:
https://www.amazon.com/TLP-040-Li-P...d=1510605819&sr=1-4&keywords=nook+hd++battery

but I thought someone with better experience could make a suggestion.

 

[ST Dog]

Do you have any suggestions for a replacement brand?

As I said earlier, no. I'm not confident any of them are any good.

Someone posted a link to the one they got in the other thread.