Hi there my samsung galaxy ACE was doing fine until a week or so again when it started losing charge rapidly when i texted or called. I keep the phone on almost all the time. overnight too as it's my only phone and it keeps its charge over night when i'm not using it but during the day i have to fully charge it several times to keep using it. The internet is blocked on the phone so i don't think i have downloaded anything cumbersome. is there any other possible answer besides that i need a new battery?