Wekin 5200mah Galaxy S7 Edge Battery Charging Case, Backup Battery Pack Cover Case for Samsung Galaxy S7 Edge (white) Compatible with Samsung Galaxy S7 Edge ONLY. Life time warranty and sold by wekin Sufficient energy: Doubles the life ofyourGalaxy S7 Edge battery life: built-in fully 5200 mAh lithium polymer battery provides extra battery life to your Galaxy S7 Edge , can get up to 260 hours of standby time, 10 hours of video playback, 36 hours of audio playback time, 10 hours of talk, or 10 hours time online; 360protection: both sides of the battery case is slightly higher than your Galaxy S7 Edge screen, and the highest height for the rest of the removable battery shell elastic, it means that if your Galaxy S7 Edge drops,the two sides will be the first to touch the ground, protects your screen; Environmental safety: microfinance institutions conform to the specification, CE, FCC, RoHS. Economy: Reasonable price,Only for Samsung Galaxy S7 Edge ,5200 mah rechargeable perfect fit case, charging and protecting 2 in 1; Trouble shooting steps: 1plugging the phone when the direction or position is not correct, resulting in male-contact phone Poor without charge. 2. Cell phone interfaces dirty or insulating materials, recommended to clean the phone before Test. 3. Recommendation charge 30% of the full clip of electricity to charge the phone before.