The Bigblue EOS Canister Back- or Sidemount is 23.8Ah and delivers a powerful output for our lights, heated glove, heated vest and heated undersuit. Mechanical ON/OFF Switch(es). The 3 BATCELLEOCANISTER rechargeable Li-ion battery packs comes with a smart charger enabling you to charge the 3 batteries in a few hours. Each BATCELLEOCANISTER is 88.06Wh. Good for travelling. Batteries and Charger included.