Very high capacity battery, 23.68 Wh, intended for the Duo Z1 headlamp. Robust and certified ATEX zone 1/21 (II 2 GD Ex ib IIB T4 Gb IIIB T135 ° C Db), it also has a quick connection to the lantern and a power indicator to know the state of the battery charge. < / p> Features: