Hobby-Ace Enlarge RC lipo Safty Bag Lipo Guard Bag for Charging Enlarge size of 235*65*180mm This is a fireproof bag, designed to stop and contain any fire caused by incorrectly charging or poorly functioning lipo packs The safest way to charge and store your lipos Protect your workshop, family and home from the hazard of lipo charging Capacity: suggest 2*2S battery1* 3S battery