GoolRC Muiltifunction Lipo Battery Explosion-proof 1857560mm Bag Safty Bag Lipo Gurad Bag Battery Protection Bag for LiPo Battery Charging RC Lipo Lithium Polymer Battery Safety Guard Charge Bag. Protect your workshop, family and home from the hazard of lipo charging. This is a fireproof bag, designed to stop and contain any fire caused by incorrectly charging or poorly functioning lipo packs.