If you plan on messing with different, unrecommended charge rates, force charging dead LiPos, or just plain worried about your low quality LiPo pack, these bags can help you be safer. These bags can contain the heat of a LiPo melt down while in storage or charging to mitigate damage to your floor, desk, and walls. LiPos have gotten MUCH safer since 2008 and items like these are no longer required to charge your batteries safely. But, if you still don't feel at ease, these items are still available.