Built-in high-capacity 2600mAh 18650 battery. The flashlight is only used for transportation and storage. The battery is equipped with an insulating spacer. To ensure normal power supply and use, please remove the insulating spacer before installation. Features 1. The body of this flashlight is built of high quality ABS material, and it has a very solid construction 2. Internal wiring applies the high efficient booster circuit, and can utilize the batteries in the largest extent 3. Excellent waterproof, suitable for outdoor environment, adverse weather conditions except for diving Specification: Product Name:INTENSE FLASHLIGHT Battery Type:Built in Lithium Battery Charging method: USB fast charging Material:ABS ❤Package description: 1*Flashlight 1*usb charging cable