My son's airsoft gun story here:
https://www.cougarboard.com/board/message.html?id=34495434
It came with a Lithium Polymer (LiPo) battery so it comes with a "LiPo sack" and all sorts of warnings about fire and only charging or storing it on non-flammable surfaces. He might set my house on fire before shooting his eye out. 🙂