2800mAh external battery comes with one USB ports (5V/1A) which can be used to charge your smart mobile phone, MP3, MP4, PSP, or any other mobile digital products. Easily recharge 2800mAh external battery with the Micro USB cable. This 2800mAh external battery supports pass-through charging so that you can charge the external battery and the digital products simultaneously. 2800mAh external battery is made of excellent quality 18650 Lion battery that can make the life of the external battery longer, and the charge and discharge cycles reach at least 1000 times.Features Capacity: 2800mAh Metal shell anti-shock 1 year limited warranty Mini size: approx 0.86*4.21inch, easy for carrying. Battery can support over 72 hours lighting. Long lifetime: 18650 Lion battery, up to 1000 charge-discharge cycles. Widely application: iPad, iPhone, MP3, MP4, PSP, or any other mobile digital products. Safety: Smart IC controller inside. Short circuit, over charge and discharge protection. Lighting(two modes): press the button will turn on the torch light, press again will turn on the flashing light. Smart charging management: system will shutdown automatically after five seconds with no output currency detected. 1. What"s in the box? 2800mAh External Battery for iPad/iPhone/iPod/Other smart phone Micro USB charger cable 2. Technical Specifications Capacity:2800mAh Input:DC5V/850ma Output:5V/1000ma Size:approx 0.86*4.21inch; Weight:approx 3.07oz Storage Temp:-10~40 degrees Note:iPhone 4/5 Cable not included