1Pc UltraFire 18650 4000 mAh 3.7V Rechargeable Battery with Wall Charger - brand new, never used - $25 firm SPECIFICATION: CHARGER: Input Voltage: AC110-240V, 47/63Hz Output: DC 4.2V 550mA BATTERY: Ultrafire Li-Ion Rechargeable 18650 Capacity: 4000mAh. Voltage: 3.7V INCLUDES: - 1 x 18650 battery - 1 x wall charger