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Old 09-19-2012, 06:32 PM   #4 (permalink)
Talking BlackBerry Encyclopedia
Join Date: Jul 2005
Model: 9800
Carrier: Optus
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Default Re: Odd discharge behaviour with high capacity battery in 9800

Originally Posted by hrbuckley View Post
Lithium Ion batteries produce very nearly the same voltage over the full useful range from fully charged to nearly depleted. Because of this the battery management system has to keep track of the amount of current going in and coming out to learn the discharge curve capacity of the battery in order to correctly asses the level of charge.
That makes sense. It corrected it's esimate again a few times, then remained at 1% charge for 3 or 4 hours, with the backlight on continuously and Google Maps running, before deciding that it really was flat, and it shut of wireless, then shut down .
Part of the problem is indeed the programming process whereby you copied the identity from the OEM battery to the new battery. Any time you swap the two you will confuse the battery management system.
So it thinks it's the same physical battery? Or that it's just the exact same type of battery?
If your new battery didn't come with instructions on how to deal with this, you should do some reading on the care and feeding of Li batteries.
Unfortunately it didn't. Perhaps they assume you're replacing the old battery, or replacing one of the same capacity.

Do you think the phone will learn how to estimate the charge for this battery? And if it does, will it then have to relearn it for the original low capacity battery, and the new one again after it's done that.
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