Features: It can charge all cylindrical rechargeable batteries, including 3.7V Li-Ion, 3.8V IMR, 1.2V Ni-MH/Cd, 3.2VLiFePO4 etc. Wide input voltage, AC 110-240V 50/60Hz, is perfect for different areas. Four independent charging and micro computer management system. Charge current intelligent auto-set of total three levels: 500mA /1000mA/2000mA/ 2000mA is fixed only for slot4. Multi-functional LED charging indicators for charging progress: 25% - 50% - 75% -100%, battery types: Ni-MH 1.2V, Li-Fe 3.2V, Li-ion 3.7V, Li-ion 3.80V (IMR) and for charging current: 0.5A/1A/2A Identify Li-ion and Ni-MH batteries automatically and adjust manually the charging mode for LiFePO4 and 3.80V li-ion batteries(IMR) Refresh for OV battery. It will not charge any battery of1.65 -2.20V (refresh current can be detected only) Multi-safety protection function of over-charge and over-discharge, short circuited, polarity reverse and so on. It can smartly identify broken batteries with much more safety. Automatically stops charging when complete. Charging at constant voltage and constant current, safe, portable and powerful, it is good for you.