XTAR WP2H Dual-Slot Li-ION/LiFePO4 Charger with Power Bank USB Output - for 18650 and similar batteries (With Car & Wall Adapters) Dual slot, independently charges two 18650, 10440, 16340, 14500, 14650, 17670, 18350, 18500, 18650, 18700, 22650, 25500, 26650 Li-ION battery cells Three optional charge currents (0.25A, 0.50A, 1.0A) and three optional charge voltages (3.2V, 3.6V, 3.8V) Advanced three stage charging - TC (Trickle Charge), CC (Constant Current), CV (Constant Voltage) automatically determined by algorithms programmed into the charge controller Power Bank functionality - this can also be used to supply the on-board USB output with up to 5v and up to 1.0A of current from a battery source! 1 year warranty when purchased from an authorized XTAR dealer!