Petzl battery pack for reactik and reactik 3xaaa not included description the battery pack which holds 3 lr3aaa 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 pack for 3 lr3aaa batteries to replace the reactik and reactik headlamps rechargeable battery allows headlamp to be used for activities where recharging