1950mah Replacement Battery For T-Mobile Samsung Galaxy S2 T989 Hercules
The battery operation time depends on conditions such as: Transmitting power level;Signal (distance between the phone and the base station);Network parameters defined by the operator.What to do before using a new battery:Use the phone till the initial charge is completely drained.Charge the battery for a long time (overnight), and make sure you don't disconnect and reconnect while charging.Use the battery till dead.Repeat overnight charge.Do these for the first 2-3 times to activate the battery to a normal life.