Sealey BT91/7PF Professional Battery Drop Tester 6/12V - Polarity Free

American style drop tester.
Polarity protected cables - impossible to damage unit by misconnection.
Load applied by internal switchgear - no sparking!
Suitable for 6 and 12V batteries.
Applies load across cells and measures output on meter.
Accurate indication of battery voltage, faulty cell and short circuited cell.