Issue
Is the rubber seal around the Vertex FNB-V57IS (intrinsically safe) battery required?
Environment
FNB-V57IS
Resolution
Yes, the rubber seal around the battery (FNB-V57IS) is mandatory to establish an intrinsically safe (IS) rating. If it's lost or breaks, the radio with battery is not IS rated.
***Note***: The rubber seal is not available for resale separately.