4700mAh, 5200mAh Extended Battery Case Phone Charging Cover for Samsung Galaxy S9 amp; S9 Plus Feature: Made of good material, this shell has a soft touch sense and a long service life. Built-in 5200 (S9 Plus) mAh rechargeable Li-polymer battery, plug and play, power to charge anywhere. The external battery charging case has precise cutouts for speakers, charging ports, audio ports and buttons. The back of the ergonomic arc design, smooth lines and beautiful, feel more comfortable. Anti-dust, water, sticky, soft and hard moderate, give your device a great protection from shock and drop. High transfer rate and stable output. Specifications: Item type: External protective battery charger case cover Color: As shown Battery Capacity: 4700mAh (For Samsung Galaxy S9) 5200 mAh (For Samsung Galaxy S9 Plus) Product Material: Rubber + ABS + Metal Battery Type: Li-polymer Output: DC 5V / 1.8A Input: DC 5V / 1.8A Compatibility: Samsung Galaxy S9 S9+ Package Includes: 1 * External protective battery charger case cover