Product : Customizable Power Bank Casing (Batteries are not included)

Input : Micro-usb 5V 1A  

Output ：USB 5V ~1A 

Size：9.6×4.6×2.5cm

Features : Over-charging protection， Over-discharging protection， Automatic power on when connected to Smartphone.

What kind of batteries to be used ? Use only Li-ion battery type 18650 with length 65mm.

Example of battery manufacturer : LG， Samsung， Panasonic， Sanyo， Sony

Do not use protected Li-ion batteries.

You can customize it according to your need. Example : 1500*2=3000mAh， 3400*2=6800mAh