Top positive review
29 people found this helpful
Plug in car battery and alternator tester,,
on 4 February 2012
This is a great product for keeping a check on the condition of your battery and alternator, simple to use
and seems accurate enough, Plug into your cigarette lighter socket, turn ignition on to see state of your battery at rest, 3 green lights its fine, other green lights should come on when you start engine to show that alternator is working. Red condition obviously shows a problem. and there's an amber light to show overcharging condition. very pleased Thanks..