TES-33 Battery Capacity Tester (RS-232) 1).Test Condition W/O shutting Down Battery 2).Compact and Light weight 3).RS-232 TES-33 Battery Capacity Tester (RS-232) Test Condition Without Shutting Down Battery. Simultaneously Measure Battery Resistance, Voltage, Current, Temperature. Auto-hold and Auto-data storage. Comparator Function. Rates Conditions as Pass, Warning, or Fail. Memory and Read ...