my battery sucks in my samsung a900 whats wrong?

Answer 1

there can be many reasons why your battery might "suck"
are you charging it long enough?
do you send text messages a lot or talk on it all the time it does make your battery run out. Maybe its time to replace your cell phones battery depends on how long you had your phone or maybe you dropped your phone and it messed up your phone and maybe it has nothing to do with battery

Good Luck