Wolf-Eyes LRB168A lithium ion rechargeable battery. This headlamp is regulated, so the light doesn’t fade when in use. Due to the power of the battery, only one is required, making for a lighter and more maneuverable battery pack. Operating voltage 2.7V to 6V.
The Wolf-Eyes rechargeable battery provides 150 minutes of runtime on High, 295 minutes on Medium, 17 hours on Medium Low and 136 hours on Low. Being a lithium ion rechargeable battery it also works in sub zero conditions.