Fenix HM70R 1600 Lumens LED HeadlampPRODUCT DESCRIPTION The Fenix HM70R Rechargeable Headlamp features the a high capacity 21700 battery, that not only boosts this headlamp to a maximum 1600 lumens, but also allows for a 100 continuous hour runtime when using 30 lumens on Low. Press and hold the large, glove friendly switch to change over to the Functional mode to access two levels of neutral white light, a red reading light, and a red flash. The hidden USBC port adds to its IP68