Petzl Reactik & Reactik Plus Battery Pack Pack for 3 LR3/AAA batteries, to replace the REACTIK and REACTIK + headlamps rechargeable battery Allows headlamp to be used for activities where recharging the original battery is uncertain Light output corresponds to 40% percent of the output provided with the Lithium-Ion rechargeable battery Headlamp burn time is identical with regular batteries and the rechargeable Lithium-Ion battery at 40% percent light output Headlamp burn time increases with (non-rechargeable) lithium batteries or Ni-MH batteries