Silicone safety casing for the battery element 18650
The silicone casing fits all type 18650 elements and is strongly recommended to ensure that all exposed battery elements are enclosed. Use the silicone casing regardless of whether you keep them in your pocket or bag!
This prevents the battery contacts from short-circuiting, if it the battery is held in a pocket together with keys or coins, for instance. Further, it protects the battery element from mechanical shock and ensures the longer service life of each element.