What is a key feature of lipo bags used for battery storage?

A key feature of lipo bags, designed for battery storage, is that they are fire retardant. This is crucial because lithium polymer (LiPo) batteries can potentially catch fire or explode if they are damaged, overcharged, or improperly handled. The materials used in fire retardant bags are specifically chosen to withstand heat and flames, minimizing the risk of a fire spreading if a battery were to fail.

While lipo bags may also have other characteristics, such as being made of durable materials, the fire retardant property stands out as an essential safety feature for users who handle and charge these batteries, especially in hobbyist applications like drones and RC models.