Seen from the outside， it is an ordinary leather protective case. In fact， it is a high capacity extra power. This 3800mAh 5V Extra Power with Leather Case for Samsung Galaxy S4 I9500 can provides you with much convenience. Featured with unique， fashionable and elegant design， this extra power can decorate your beloved mobile phone in a new and good-looking appearance. Adopting slim and light weight design， it is portable to carry. Besides， it is also a practical case to protect your phone from scratches and other minor damages. With high power capacity and rechargeable design， it is environment-friendly and cost-effective. You really deserve it!                                    Features            Not only a backup battery but also a protective case for your Samsung Galaxy S5 I96003800mAh large power capacity ensures long talk time and standby timePrecise circuit board prevents overcharging， short circuit and generating heatLight weight size， portable to carryStable power output and input Supply instant power to charge your device anytime， anywhereTightly touch with cell phone inside electronic chips for fine conductivity and quick charge                                                             Specifications             Capacity     3800 mAh     <br> Battery Type     Li-polymer     <br> The Input Voltage     DC 5V， 500mA    <br> The Output Voltage     DC 5V， 800mA     <br> Charging Time     4.8h     <br> Standby Time     >480h    <br> Talk Time     >6h    <br> Wi-Fi     >10.6h    <br> Audio Play     >36h    <br> Video Play     >10.6h    <br> Dimensions     (5.87 x 2.87 x 0.71)" / (14.9 x 7.3 x 1.8)cm (L x W x H)    <br> Weight     4.02oz / 114g     <br> Color     Black    <br> Applicable Models     Samsung Galaxy S4 I9500    <br> Product Model     Power Pack     <br>                                                             Package Includes            1 x Extra Power<br> <br>