Hey all, I just purchased an extended battery (Andida brand, 2250maH). It came with a wall charger that seems to be working fine with my other extended battery. So I put the new battery in my Samsung Galaxy s2 skyrocket and it doesn't turn on, so I go to charge the thing. When I plug the phone into my charger, it starts to vibrate every 3 seconds or so. When I put my stock battery back in, the phone works fine. Is this a battery issue? Or does the battery simply need to charge? I should also say that when the phone is plugged in with the extended battery, it won't turn on. Thinking this is weird... Any help is appreciated!