The Best ideal is :Shake it the  Led Light Up ,very Automatically Products 

1. Built-in Lightning/Micro cable, easy to carry;
2. Plastic casing, easy to select color;
3. Innovative design, round shape;
4. Over Charging Protection;
5. Over Discharging Protection;
6. Over Current Protection;
7. Warranty: 1 year.

For this products have two Exclusive Patented Products :

Patented number as below:

ZL 2014 3 0146063.9

ZL 2014 2 0320371.3