The 4800mAh Extended Use Power Bank is designed for all-day shifts and assignments where a backup isn’t an option. Compatible with all M-Series products, it features the easy-to-use rail mounting design that supports Vuzix’ unique hot-swap capabilities, meaning you never need to interrupt your work when changing out the battery. With operating temperatures ranging from 0C/32F to 45C/114F, this battery is excellent for use in the freezer or on the line.