LED battery and alternator tester.
Take the guesswork out of that electrical problem; as to weather it’s the battery or alternator that’s gone down.
This is a tester that will test both for you. Rolson makes it.
. LED indicators verify condition of battery and alternator.
. For 12vdc systems only
. Magnetic backing sticks to metal surfaces for hands free operation.
. Fitted with 600mm of cable, crocodile clip and probe.
This is also handy for them last minuet checks when going abroad.