Elebase Galaxy S9 Battery Case, External Rechargeable Power Bank Charger,4700mAh Protective Portable Backup Charging Case Pack for Samsung Galaxy S9(Black)(Not for Galaxy S9 Plus) EXTEND BATTERY LIFE  --- The 4700mAh rechargeable battery case delivers more than 100% extra battery capacity whenever you need it, giving you the power to do more. You don't even need to remove the case to sync up your phone with a computer or laptop. Charge On The Go! USER-FRIENDLY DESIGN  --- Precise fit for Samsung Galaxy S9 preserves the real user experience of your device. You can easily keep tabs on battery power with the integrated LED status indicator. Furthermore, the extended opening for back camera can also facilitate the removal of the battery case without leaving fingerprint smudges on the camera. ULTIMATE PROTECTION  --- The battery case features a rigid plastic shell and raised corners, to provide your Galaxy S9 with complete protection against drops and hard falls. This battery case's interior is also covered in soft microfiber lining to protect the rear glass panel of your phone from cosmetic damage. CHARGE WITH CONFIDENCE  --- Built-in fail-safe circuitry and temperature protection prevents over-charging and overheating. Besides, The first-class lithium-ion polymer cells also guarantee the most efficient charge. WARRANTY  --- We back this SAMSUNG GALAXY S9 battery case with one year warranty and friendly after-sale customer service. Please don't hesitated to reach out if there is any problem for your order :) Protective Battery Case for Samsung Galaxy S9 * 1 User Manual * 1 Capacity - 4700 mAh Material - Lithium-ion Polymer Input - 5V/1.8A Output- 5V/1.8A Case recharging time:2 to 3 hours Case Dimension: 6.0 x 2.8 x 0.8 (L x W x H) Product Weight: 3.8 Oz Slide your Galaxy S9 all the way into the bottom section of the case and make sure the cases connector is fully inserted into the phone. Once your phone is safely installed in the case, press the LED status button for about two seconds to charge it. Gray - indicates 75%-100% power level Green - indicates 50%-75% power level Blue - indicates 25%-50% power level Red - indicates 1%-25% power level No LED lighting up indicates an immediate recharge is needed.