The BATB Series Battery Boxes are a distinctive red for use in fire alarm systems. The BATB-40 provides a single level (two battery capacity) of battery storage with an optional shelf that increases the battery capacity to four batteries. The BATB-80 has a mounted shelf and holds up to four batteries. Note: The actual number of batteries the battery box can support depends on the size and weight of the batteries. Refer to Technical Specifications for specific information. These battery boxes are used with the following battery types: Gel-cell Nicad Sealed Lead-acid Wet-cell