The Nitecore SC2 with double battery charger slots is compatible with almost all cylindrical batteries. The charger features an intelligent charging technology that can charge a battery up to 3A current in a single slot, which only needs 1.5h to completely charge a 3000-mAh lithium battery. Besides, it automatically detects the IMR, LiFePO4, Li-ion, Ni-MH and Ni-Cd batteries and applies the appropriate charging mode, constant current charge or constant voltage charge.