This 3800mAh 5V Extra Power for Samsung Galaxy S4 I9500 is a good replacement for your former malfunctioned one. Made of high quality material， the outer shell is high in strength and sturdy in structure to make it great in abrasion， bump and impact resistance. Besides， the inner electronic chip is precise to ensure high and stable performance. Built-in smart chip can protect it from damaging caused by short circuit， over-charging and overheat. What is more， it is portable and convenient to carry as its slim and lightweight design. With high power capacity and rechargeable design， it is environment-friendly and cost-effective. What are you waiting for?                                    Features            Li-polymer battery type is rechargeable and environment-friendly3800mAh 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     (5.59 x 2.87 x 0.71)" / (14.2 x 7.3 x 1.8)cm (L x W x H)    <br> Weight     3.28oz / 93g     <br> Color     Black    <br> Applicable Models     Samsung Galaxy S4 I9500    <br> Product Model     Power Pack     <br>                                                             Package Includes            1 x Extra Power<br> <br>