UltraFire 3.7V Rechargeable Battery Charger for 18650 14500 17500 17670 WF-139 2400mAh 3.7V 18650 Li-ion rechargeable Battery No memory effect, recharge up to1000 cycles Manufactured by Hi-capacity power products This charger is able to charge 18650, 17650, 17670, 18670, 123A Li-ion battery Power Input: 100-240VAC, 50/60Hz ;Charging current: 350mA x 2