Water resistant design. Super bright LED flashlight torch. Adopts high-efficiency constant-current output circuit to maximum use of battery. Long service life up to 100000 hours. This wired single charger only works with 18650 battery. LED flashlight torch, wired single travel charger and one piece 18650 rechargeable battery are included in this kit. The battery comes with particular board protection design which can protect the battery from over-charging and over-discharging and prolong the service life of the battery. Compact design and convenient to carry with the strap.