This circuit is even simpler and employs a 6V feed from one of the stator connections on the vehicle’s alternator. This is connected to a 6V automotive relay (RLY1) which controls a Continuous Duty ...

Turning the key to discover nothing but a dead battery isn’t fun. But it happens. Inverters, coolers, radios, warning strobes, laptops, battery chargers, printers and other necessary accessories put a ...