Capable of charging 2 batteries simultaneously;
Each of the two battery slots monitors and charges independently;
Over-voltage, over-discharging, short-circuit and reverse polarity protection
Charger for 3.7V rechargeable 10440/14500/14650/16340/16650/17650/17670/18350/18490/18500/18650 Li-ion battery
A great charger, we have one that was a gift, and decided that a second one was needed. I will recommend to my friends!!!