The LipoSack just may have saved my house. I had just gotten a new battery charger and was actually using it to put my batteries into storage mode. I had already done a few when I set to do my last two batteries.( I have had and used a LipoSack for several years, since I first started using lipos). About 30 minutes later the smoke detector in my shop went off and I found that the batteries were burning. The LipoSack contained the flames and I was able to get the the sack with the batteries outside were they burned themselves out. Thanks to the LipoSack, I just had the clear out the smoke and smell.