Features:<br />Compatible with Samsung S5<br />Capacity: 3800mAh<br />Output: 5.0V / 1.0A<br />Input: 5.0V / 1.0A<br />Charging time: About 5 hours<br /><br />How to use:<br /><br />To charge the phone with the battery case:<br />● Attach the battery case to your phone， and then press the power button. The battery case will begin charging your phone.<br />● Press the power button once to check the battery level. The illuminated LED will show the battery level.<br /><br />Assembly: <br />● First pull out the top cover.<br />● Slide your phone gently into the the battery case， and make sure the phone is well connected to the micro USB 2.0 connector of the battery case.<br /><br />To charge the battery case: <br />● Connect the charging cable to the battery case’s USB input interface， and then connect the cable to a USB charger.<br />● Press the power button once to charge the phone and battery case simultaneously. The battery case is fully charged when all four LED indicator illuminated and stop flashing.<br /><br />Notes:<br />● When charging the battery case with phone attached， the phone battery will be charged first. After the phone battery is fully charged， charging of the battery case will begin.<br />● When charging the battery case with phone attached， data transfer is supported.<br /><br />    Specifications<br />General<br />  Type: Backup Power Banks                                                  <br />                        Capacity Range: 2000-4500mAh                                                  <br />                        Connection Type: Micro USB                                                 <br />Dimension and Weight<br />  Product weight: 0.108 kg                                                  <br />                        Package weight: 0.175 kg                                                  <br />                        Product Size(L x W x H): 15.0 x 7.6 x 1.2 cm / 5.90 x 2.99 x 0.47 inches                                                  <br />                        Package size (L x W x H): 22.0 x 11.0 x 2.5 cm / 8.65 x 4.32 x 0.98 inches                                                 <br />Package Contents<br />  Package Contents: 1 x 3800mAh Backup Battery Power Case， 1 x English User Manual                                                 <br /><br /><br /><br />                                            <br />                                                <br />