The SLB series of commercial steel battery units is designed to provide efficient and reliable emergency lighting. Utilizing a sturdy, all steel housing, the SLB presents a modern and unobtrusive design. On higher capacity models, the cabinet front is sloped to allow better internal access and superior low angle light distribution. The SLB can also accommodate a wide variety of options, including auto-testing self-diagnostics and remote testing High efficiency, rapid recovery, precision control charging system 30 min emergency power duration standard Momentary push button test switch Diagnostic/pilot LEDs for AC On and charge