I ran my battery down to zero - auto-shutdown - and then plugged it into the charger. This is when I remembered that the NC will refuse to boot below a certain battery level. Boo, I still wanted to override that and boot into the OS with the charger plugged in.
Simple solution: I swapped my SD card to my bootable Clockwork card. This appears to override the part of the bootloader that checks the battery level. Then, while in Clockwork I swapped back to my usual data SD. Then I selected "reboot" from within Clockwork and it happily booted into the OS on low battery.
Hope this is useful to all =)
Power Cable and Totally Dead Battery
I have run my Nook Color long enough to consume all the battery. That is, when I power-on I get a "red battery" symbol on the screen with a message saying "Wait 15 minutes and try again".
While the red battery displays I can power-down (hold the power button for about 3 seconds), but it seems the BIOS reboots again, to that same red battery screen. To me this can seem alarming.
However if I do as the screen says, that is, leave the Nook Color alone for 15 20 minutes, I find I can power-down (power button 3 seconds) and the Nook Color will boot normally, albeit with a very low battery.
I just leave the battery cable plugged in. After awaking in the morning the battery is full again and none the worse, for wear.
I am running CM7 RC4.
Related
My phone (which is currently running Incubus26Jc's Android 2.2 FroYo RLS10 NAND) rebooted at around 12:30 AM. I noticed that it reboots, randomly, about twice a day. Not sure of the cause, haven't looked in to it, but normally it comes back to the desktop, like a fresh boot of the phone. So I thought nothing of it.
Last night, however, during the reboot, SOMETHING happened, and it seemed to have gotten stuck in an infinite loop. It would show the boot animation for a while, then lose power... then it would notice the power cable was plugged in, and try to automatically boot up.
If you notice, plugging the power cable in forces the phone to boot all the way into the Android OS. There seems to be no "charge while off" feature, at least for me.
Anyway, this endless loop caused the phone to reboot over and over and over, until the point where the battery was so far drained, that this "hand off" between the boot screen and the actual OS (somewhere during the boot animation) where the phone had to run on battery for a split second, was long enough to cause the phone to power off completely.
I couldn't flash back to Windows (I thought) because the phone didn't have enough of a charge to stay in bootloader mode while flashing the phone. Which was mostly true.
FYI (how I fixed my problem): should something similar happen to you, put the phone in true BOOTLOADER mode (hold the camera button when you press the power button, see the colored bars across the screen), even though the indicator doesn't light up, the phone DOES charge when in this mode and plugged in to a wall charger (and probably while plugged in to USB).
As far as I know, you are required to maintain a certain level of charge to run the RUU because the USB cable cannot charge the phone WHILE FLASHING, but while waiting in bootloader mode, the battery will charge. I was able to let the phone sit at the bootloader for about an hour then started up my phone and had over 70% charge according to Android. Working again!
thank for the 411. i had a similar issue with rls10. went to 10.5 and rls11 and flashed a new kernel, no further issue since
A strange thing happened to me: last night I turned off the phone with about 60% of charge remaining, this morning I turn it on and I find 13%, after a reboot it gave me 50% ...
What can be the cause?
I found that here:http://forum.xda-developers.com/showthread.php?t=755903&page=33
You can try it :
This is the procedure that works for me:
The following steps should significantly extend the battery life on your phone:
1. Let the battery drain close to empty (5% or less).
2. Connect the phone to the charger (AC or USB, USB is better) while powered on and allow the phone to charge until the notification LED is green, indicating the device is fully charged and untill the voltage is at least 4187mV. A higher voltage like 4192mV or more is even better. Use a tool like Overcharged or Battery Indicator to monitor this. Note that a green notification LED does not automatically mean that the voltage is good too.
A higher voltage means in practice that it will take longer to discharge, a lower voltage means that the battery will discharge a lot quicker! The difference can be quite significant!
3. Disconnect the phone from the charger and power it off.
4. Reconnect the phone to the charger while powered off and allow the phone to charge until the notification LED is green. The notification LED may turn green immediately. Leave it on the charger for another hour.
5. Disconnect the phone from the charger and power it on.
6. Once the phone is powered on completely (has restarted fully) wait 2 minutes and power it off again.
7. Reconnect the phone to the charger while powered off and allow the phone to charge until the notification LED is green. The notification LED may turn green immediately. Leave it on the charger for another hour.
8. Leave the phone on the charger and reboot into the ClockWorkMod recovery menu and wipe the battery stats via -> Advanced -> Wipe battery stats.
9. Disconnect the phone from the charger, restart the phone and start using it as normal.
From then on always let the battery drain close to empty (5% or less) as often as possible and then charge untill the voltage is at least 4187mV. A higher voltage like 4192mV or more is even better.
Normally you will have to do this only once. However, on all Android ROMs, if you flash a ROM while charging or during the first boot screen on, first boot mucks up the levels Android thinks the phone is at, i.e. Android will think you’re at 100% when maybe you’re only 90% or whatever. So in theory you will need to repeat this every time you flash a ROM while charging!
Better is to make sure the battery is charged before you flash a ROM and just remove the USB/charge cable before you flash a ROM. Put it back in (if you must) after the first boot screen (when the custom screen or whatever shows).
Thank you, I'll try it
Hey guys, here's what's wrong.
I was running the latest version of MIUI and found it to be annoyingly buggy, so I installed Cyanogen from ClockworkMod and start installing it. It ended up hanging halfway through and wouldn't progress. I made what was probably a dumb decision and decided to turn it off since it seemed to have frozen.
Now...it won't turn on. If I connect a wall charger or USB cable, the symbol of an empty battery with the white loading circle comes up for about five seconds, but the circle is not rotating and the screen goes black. This repeats nonstop.
Holding down vol down + home + power to get it into Download mode fails, it just says LOW BATTERY CAN'T DOWNLOAD in red letters. Doing the same with the volume button up gets nothing. I've tried leaving it to charge for two days with no results.
I bought a USB jig and tried using it (removing battery and SIM card, putting battery back in, plugging jig in) but it does nothing. I've tried several times.
Any advice? Is it just dead?
try an external charger to charge your battery or borrow someones battery to test your phone. failing that, charge your battery in someone else's phone.
Was the battery full when you tried installing cyanogen mod, and did you follow the instructions fully?
Clean the battery contacts on both the battery and phone pins. Use another charger, and check the port for blockages/dirt (blow in it).
Try another battery..
-Leave the jig in for 30 mins.
-Hold the combo and then put the battery in whilst holding the combo.
-Plug into your computer (with battery) and try the combo. Then try without, and put battery in whilst connected and whilst holding.
-Hold combo then plug into computer
Some of the methods above may require some extreme skill or a helping hand
It could be water damage.
I don't think it is bricked as i don't think those messages would be showing up, but i could be wrong.
If none of that works and no-one else comes up with any other ideas then you may have to use the unbrickable mod. Search for it, it's a hardware hack..
Good luck
I looked in the previous threads about non-booting but no one I could find had my issue. Bought the Nook HD+ about 4 months ago and rooted it and installed Android (not sure which version but cm11). Out of the blue, last week I pulled it out of my bag and the battery % was flipping between 1% and 31%, so I put some stuff on it via USB and then shut it down to charge. I plugged it in overnight and tried turning it on in the morning. All I was getting was the low battery picture, so I kept trying to charge it, but it wasn't charging, the power light would go to orange when I plugged it in, thena fter 3-5 seconds it would flip green and then turn off and retry. My assumption is the battery is dead, but it could be a corrupted OS now as I got it to charge long enough to get to the CM11 boot menu. But I even went out and bought a new charger and converter to rule that out and it still is stuck in the same boot sequence. I obviously can NOT charge this thing while it is off because of it's reboot loop, it can't charge. I'm not quite sure what is going on or whether it is a battery or boot issue but after I leave it for a big it freezes on the cyan picture (which is frozen on some scrambled version of it) until I turn it off.
I can't power it on enough to charge it to rule out the battery, I tried holding the power and n button for 3 seconds, letting go of the power, and then pressing it again to get into the recovery menu, but that isn't working either. And I prepared another SD card for a second flash for a corrupted OS and that didn't seem to work either.
I'm stuck here and I'm not sure what to do now to get it running again. I don't care about the data on my tablet at the moment.
Try plugging it into a PC USB port over night.
Sent from my SPH-L900 using XDA Free mobile app
That's what I did that got it charged enough to get to try to boot, where it now shuts down. But now as it tries to boot it reboots, maybe from too much power consumption? I only had it plugged in for half hour or hour before that got it charged to the point where it boots to the logo screen. I have a feeling it is not charging because every reboot the light turns off (orange light stays on for like 5 seconds)
I will plug it in to my PC and charge it overnight and let you know what happens. It's interesting, I plug it in now and the orange charge light comes on, shows the Nook screen, then shows the low battery screen and shuts off, then the orange light turns off, but it remains plugged in... not sure if it is still charging but as I said, I will leave it overnight and see what that gets me.
No success. I can turn it on and the charging lights turns on for 5 seconds and shows the nook screen, then goes black and shows the low battery screen, then immediately shuts off and the charging light turns off and it no longer charges.
Any other suggestions? I can't seem to do anything with the Nook now.
I have a HTC Desire 626, and am experiencing several battery/power issues:
fast drain, percentage decreasing while plugged in and charging, random percentage shutoff, "restarting app __ of __" on startup, etc.
To this point, I have tried installing a microSD card to increase space (I now have about 4.2GB, or 25%, free), using the Norton Clean app, wiping the cache partition (which worked for about a week), rebooting in safe mode, and running a battery calibration app.
Today, after reading instructions from another thread (https://forum.xda-developers.com/showthread.php?t=755903) and the tips that followed, I performed these steps:
1. With phone turned on, charge to 100%/green light (it took all day, and I had to unplug my charger from the wall, wait 10+ seconds, and plug it back in before it would charge without interruption).
2. After light turns green, allow to charge 2 more hours.
3. Disconnect phone and power off. (It immediately dropped to 99% when I disconnected.)
4. With phone powered off, reconnect to charger. (The light turned amber, and held at 99% for a while before turning green again.)
5. Allow phone to charge for 1 hour after light turns green.
6. With phone still powered off, disconnect charger.
7. While disconnected, power phone on. (When I did so, I got the "Restarting apps" message, but not the "Restarting app __ of __" message.)
8. Power off.
9. Reconnect charger and charge until light turns green.
10. Charge for 1hr after light turns green.
11. Reboot to bootloader.
12. Access recovery mode.
13. Wipe cache partition (Advanced -> Wipe Battery Stats wasn't an option).
14. Reboot phone.
When my phone finished rebooting, the battery percentage was 89%. It dropped to 87% within 2ish minutes.
Since it's been turned on (less than 30min), it's received a few E-mails and updated two apps. The percentage is now 82%.
It is still draining quickly and shutting down at random percentages.
Any suggestions as to what I did wrong, could do differently, or how to fix my problems?
Thanks so much.