A boost function (if available) can be used several times, but is only available for a short time at a time. Connect the magnetic end of the included cable to the charging point, and the standard USB at the other end plugs into the included USB mains adaptor. H19R Core Rechargeable LED Headlamp: Up to 3500 lumens, Fusion Beam technology, directional light adjustment, Bluetooth connectivity, extreme protection, and natural light for color-critical applications. Discover the power of precision lighting with the LEDLENSER H Series Headlamps - a range of advanced head torches designed to elevate your visibility, productivity, and convenience. Other accessories comprise of multiple mounting systems that include helmet clips, a GoPro mount, a tripod mount, a universal mounting bracket (handlebars etc.

The swivel mechanism of the head lamp provides stepless adjustment of the beam position within a 130° angle so that it can be exactly where you need it. Bought this as a gift for a naturalist to help them identify some species of lichens and moths so I can't comment on actual use. The H19R CORE is weather proof giving supreme 100% dust protection and watertight against the effects of immersion up to 1m / 30 minutes. POWERFUL HEAD TORCH, ADJUSTABLE FLOOD AND SPOTLIGHT AND RED LIGHT OPTION, THE PERFECT MATCH FOR ANY SITUATION The Ledlenser H19R Core with up to 3500 lumens features the Fusion Beam, combines the power of two lenses enabling one to control the flood and spotlight for perfect illumination and a red light functionality for night vision The rechargeable integrated lithium-ion battery can be charged quickly via magnetic USB.The charging feature suits us well as the torch is always kept in a handy place and always charged up and ready to use.

The swivel mechanism of the head lamp provides stepless adjustment of the beam position within a 130° angle so that it can be exactly where you need it, while the highly reflective headband enables drivers to easily see you in the dark.The above parameters are tested in lab conditions using the included 4800 mAh lithium-ion battery pack and data may vary between torch, batteries, environment and individual usage habits. A larger capacity 4800 mAh lithium-ion battery pack provides excellent run-times, with up to 4 hours in the highest constant output. The unique Fusion Beam light pattern combines the power of two lenses and enables individually controllable flood and spotlight with intuitive operation. The Ledlenser Connect App and Bluetooth control allows you to customise and control the light setting remotely via your smartphone. The battery can be charged inside the battery pack via the magnetic charging point located on the end.