TES-33 Battery Capacity Tester (RS-232) 1).Test Condition W/O ... Down Battery 2).Compact and Light weight 3).RS-232 TES-33 Battery Capacity Tester (RS-232) Test Condition Without Shutting Down ... , AC adaptor, Optical RS232 cable, CD PC software, Carrying case. TES-33 Battery Tester (RS-232)