Cager B030-8 super-capacity 20000mAh mobile power supply with flashlight and card-reading functions, is a smart e-commerce mobile power supply, supports charging different products. 20000mAh super high capacity, high-brightness dual LED light design, can be used as a flashlight or reading light. The SD card can directly insert into it, and TF card can insert into it via the SD card connector, can do the reading and writing when it connects with the computer, can achieve the OTG function when connects with the tablet. Built-in smart circuit which has over-charge, over-discharge, overload, short circuit and other protection functions. This product has two USB interfaces, SD card interface and mini USB interface; Two LED bulb, one POWER button, supports express charge mode and common mode; Compatible with cell phones, digital devices and tablet PC which have USB interface. Included: USB data , iPhone 4S connector, iPhone5 connector. With it, you will never worry about the off-power problem.