STAND HIGH&reg;3.7V 12PCS 5000mah 18650 Battery Rechargeable Li-ion Battery with Built-in IC Protection ,can be used for LED flashlight and headlamp Provides excellent continuous power sources to your device Li-Ion Rechargeable 18650 with IC Protection Charge Time: about 6~8hours High energy density, long life battery UltraFire18650 5000 mAh Rechargeable Battery