The battery pack, which holds 3 LR3/AAA batteries, provides a back-up solution in case the rechargeable battery is completely discharged. It allows the REACTIK and REACTIK + headlamps to be used in remote areas where the battery cannot be recharged. Battery compatibility: alkaline, rechargeable Ni-MH and lithium.
Light output corresponds to 40 % of the output provided with the Lithium-Ion rechargeable battery.
Works for constant lighting mode only.