Disclaimer : You use the information contained in this thread at your own risk. I am trying to find a solution to the problem that plagues so many of us. You can hardly make the battery worse!
Alright... technical details - TA-079 PSP, clean IDSTORAGE, running 3.52 M33-4 with 1.50 kernel game folder, magic memory stick is not an issue here, everything installed with original C+D pandora package, no GUIs or anything, normal 1800 mAH official sony battery.
Now, here's the issue - converted to pandora just fine, converted back. Restored eeprom, got error at address 0x14. Tried convert to normal. Same effect. Now the battery keeps dying on me when it's percentage is around 67%. I'll be playing a game or listening to music when the grey 'battery low' screen will pop up, and my PSP will enter sleep mode. I turn it back on, and it was as before except 20 seconds later my PSP enters sleep again.
There is not a problem with the PSP - I have tried it on 3 different ones , it is not a problem with the battery per se as it worked perfectly fine before being pandorised, and just for continuity's sake I tried it on my other battery and now that does it too.
If no-one has any advice on how to fix it, could you tell me how to disable the battery checking functions?
Sigh. No use. Some other forums suggested shorting or fully draining the battery. This is a bad idea as the PSP's batteries are Lithium-Ion and discharging below a certain point is bad for them. Nethertheless, I gave it a go. It charged for a longer length of time so I assume it is now fully charged, however when the battery percentage reaches ~84% it goes haywire - 54% to 23% to 69% et cetera. Then I get the grey screen and it goes into sleep.
MOST LIKELY EXPLANATION
I believe that the Pandora program occasionally makes an error writing and corrupts a sector of the battery's memory. The battery does indeed have charge, but the software that decides just how much (the eeprom, the battery's OS) is screwed up.
THIS IS NOT A PROBLEM WITH ANYONE'S PSP OR A PRE-EXISTING ISSUE WITH THE BATTERIES. IT IS CAUSED BY PANDORA - MOST LIKELY THE CORRUPTION OF THE BATTERY'S MEMORY AT A CERTAIN ADDRESS SO THE EEPROM CAN'T BE RESTORED PROPERLY. HELP WOULD BE VASTLY APPRECIATED.
POTENTIAL SOLUTION FOUND!
(1) Get a battery that has never been a problem. Charge it to 100% and when it says 'charge complete', make a backup of the eeprom.
(b) Rename to 'fleeprom.bin'. (Can be found on root of memory stick)
(2) Remove any battery that may be in there, plug in the AC adaptor and start your Pandora application. Don't worry about the errors.
(b) Make a backup of the AC adaptor eeprom.
(c) Insert your glitched battery and flash the AC eeprom.
(d) Charge. You will notice that when you remove the AC adaptor the PSP will turn off.
Don't worry about this.
(3) When charge is complete, rename the ac adaptor rom to ' aceeprom.bin'. Then rename the
battery rom to 'eeprom.bin'.
(b) Flash it.
Doesn't work, turn on/off, remove and replace battery. Experiment.
>>>>TESTING STILL IN PROGRESS<<<<
Links to other people having this problem as I find them: