I bought this battery because the old one I had that came with the phone wouldn't hold a charge for very long. I got this battery and the first day it lasted about 12 hours now it lasts about 8 and I hardly use my phone. I know it only cost me 3 bucks but still if you are going to advertise that this is an OEM replacement it should preform like one reguardless of the price. I have contacted the seller to get this issue resolved lets wait and see if they respond.