SkyTouch 3300 mAh Back Door Cover Extented Battery for Verizon Motorola Droid Bionic XT875 -Black Lithium-ion technology; 3300mAh capacity Includes extended-size battery cover door in soft-touch matte finish (replaces original battery door). Battery cover maintains opening for camera. Advanced lithium-ion technology keeps phone working at optimum performance. Smart IC technology ensures safe operation and long lasting battery life.