2pcs Ultrafire 18650 4000 mAh 3.7V Li-ion Rechargeable Battery
Features:1.New battery2.High quality and durable3.Provides excellent continuous power sources to your device4.High energy density, long life battery5.This battery has an extra long life for all your battery powered devicesSpecifications:1. Battery Type:18650 battery2. Voltage: 3.7v3. Capacity: 4000mAh4. Charge Time: about 6~8hours5. Rechargeable Times: about 500~7006. Material: Li-ion Battery7. Weight: 180g8. Dimensions: 6.5 x 1.7 cm(L x Dia)