| | Re: Odd discharge behaviour with high capacity battery in 9800
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. 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.
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.
My other Blackberry is a PlayBook.