The RPT-T300 (5-in-1) is the only 12V battery condition tester with 6V~12V Regenerator & Charger & Power Supply & Discharger checkers for 6V~12V batteries: 5 machines  are integrated all-in-ones.   In 'CONDITION TEST' mode, it can test the battery conditions (12V, up to 200Ah) within a few minutes. The user can see the determination of condition tests as 'CELL CUT', 'CELL SHORT', or 'CELL CORROSION' on the screen with a beep sound within 1~10 minutes.