Features: 
RENEW-S2 can charge 2 or 4 AA/AAA Ni-MH/Ni-Cd batteries, and 1 or 2 pieces 9V Ni-MH/Ni-Cd/Li-ion batteries. 
Controlled by MCU, and using pulse charging technology, prevent the charger from over-charge, over-discharge, over-current and over-heat. 
Can be applied to supplied voltage globally. 

Electrical Specification: 
Input: 100-240V AC 50/60Hz 
Output: DC 2.4V 600-670mA for AA/AAA batteries, and for the 9V batteries, it's 250mA when the voltage reach to 6-7V, 140mA when 8.4V, 30mA when 9.6V 
Battery saturation charging rate: >80% 

Note: 
This battery charger is used for AA/AAA Ni-MH/Ni-Cd batteries, and 9V Ni-MH/Ni-Cd/Li-ion batteries. 
The absolute 0V battery can not be charged. 
Can not charge alkaline or carbon battery.