Ok I need some help. My phone was shutting off randomly and always dying between 25 and 30 present. I bought the phone in November of 2009 so that's almost 2 yrs. I read it could be a battery issue. So now I just took my 3GS apart changed the battery and put it back together. At first the mother board wasn't lined up and I thought I broke it but anyway my question is this. My phone is back together and up and running now. I need to know what do I do know like is there anything els I have to do or just charge to 100 then kill it to 0 then to 100 again?