Lopurs 2600mAh Rechargeable Li-ion Battery for Samsung Galaxy S4 , GT-i9500 , GT-i9505 , SGH-M919(T-Mobile) , SCH-i545(Verizon) , SGH-i337(AT&T) , SPH-L720(Sprint) Brand new and high quality Li-Polymer battery for Samsung Galaxy S4 / i337 Best replacement for the original battery with comparable standby and talk time Use the authorized charger only Capacity : 2600mAh If you do not use the battery for a long time, please put it in a dry and cool place and make it full charged once every three months