Ly European Plug i4 Li-ion/NiMH 18650/26650/AA/AAA Battery Charger 4 Output Protects from over-discharging, over-voltage, short-circuit and reverse polarity Capable of charging 1, 2,3, or 4 batteries at a time.Automatic Temperature Monitoring - as your rechargeable batteries charge - prevents heat damage. Automatic Cut-off Safety Timer Feature - Protects your rechargeable batteries from over charging. The charges comes equipped with an advanced safety functions including Lithium battery, power battery ,alkaline batteries Manual Select, automatic charge off and built-in temperature controls. Worldwide voltage capable - 100V ~ 240V AC 50~60 hZ. Fully capable of Charging all capacities of ALL rechargeable batteries. Automatic analyzes each battery - to determine battery state prior to charging.  Automatic detection of defective batteries.