Fits 3.7V Lithium Ion Batteries 26650 18650 18490 18350 17670 17500 16340 14500, RCR123A, 1,1,1,1.23A, 1.23A 2 v Ni-MH. /Ni-Cd AA. Complies with the UL standard of the charger and is equipped with intelligent identification circuit, flame retardant material. Provides 2A fast charging when voltage is low, and trickle charging when fully charged to ensure safety and extend battery life. Package Dimensions ? : ? 14.1 x 11.1 x 3.4 cm; 150 g