Battery Doctor Instant Tester Battery Voltage Monitor 20040 19-3514

A push of a button tells you if your battery is weak or fully charged. Simply attach the ring terminals directly onto your battery. If a charge is needed, attach a Battery Doc(R) Charger directly to the tester for a simple tool free connection. Comes with peel and stick velcro for easy mounting directly on or near your battery. Reverse Polarity protected. 18(TM) lead comes with 3 Amp fuse.