LOPURS 2850mAh Rechargeable Li-ion Battery for Samsung Galaxy Alpha / G850F / G8508S / G8509V Brand new and high quality Li-Polymer battery for Samsung Galaxy Alpha / G850F / G8508S / G8509V Best replacement for the original battery with comparable standby and talk time Use the authorized charger only Capacity : 2850mAh 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