4200mAh backup battery case for Samsung Galaxy S7

Overview
Lithium ion polymer batery 
input 5V 1A  
output 5V 1A 
working temperature 0℃-45℃
The electric core capacity 4200mAh
stock/ transport temperature -20℃- +50℃
cycle life more than 500 times
rate of charge 4hours
Intelligent IC can effectively avoid short circuit 

product sizeL152.5*W71.9*H17.4(mm)