The TOPDON BT600 Plus is a 2-in-1 battery and resistance tester built for diagnostics in any work environment. Designed for shops, service centers, and mobile techs, it combines advanced conductance testing with internal resistance measurement to deliver results across 6V, 12V, and 24V systems. Featuring a built-in power supply, it offers users flexibility when working with deeply discharged or bench-tested batteries. The 3.5" display makes results easy to ready, while sequence testing processes up to 500 batteries in one workflow. Supports multiple battery types including acid, AGM, GEL, EFB, and lithium. Onboard data storage allows users to review past tests, compare results, and track battery performance. Features built-in thermal printer to generate reports.