Sdi Pulse Load Battery Tester CELL03 Test Services: SLA batteries CELL CHECKER (CELL03) SDi offers a wide range of alarm component test tools to complement our detector test equipment. These tools include devices for testing auxiliary components of alarm systems, such as batteries and audible appliances, as well testing solutions for more specialized fire detectors, such as duct and flame detectors.Accurate pulse load testingTests SLA batteriesIdentifies weak or failing batteries in alarm systemsTests battery performance ? not just voltage/internal resistance