Currently I am using a Blackberry Curve 8310 which is just 8 months older . Initially it was working just fine . But now it would die after just a single call instead of charging it for hours . But when I installed a new battery which i bought from AT&T store the problem was solved . I just wanted to know specifically whether it is the battery or the source of the battery . This had became a continuous issue with the Black berry batteries ? So suggest some tips so that the life of my batteries are extended ?