A missread, I'll rewind. As a car battery it is fine and hunky dory to link up and use. Now this bit may be an urban myth. ---8<snip A car charging system is more likely to pump a greater kick through the system, which a bike system may well not be happy to take. ---8< snip I for one would prefer not to test that theory, it could be that it just relates to 6v V 12v systems.
Simply born from the occasions where the bike has a 6V battery. If both are 12V, then there's no problem. I've jumped my bikes enough times from cars to know the battery doesn't fry.
I can only tink they are trying to whoosh & have whoosheed themselves. -- Nige, Land Rover 90 Yamaha R1 Range Rover Vogue
The zener used on SOBs clips at 15 volts to reduce the total energy delivered from the crude pulses of the permanent magnet alternator. If a car's alternator delivered 15 volts it would boil the car battery to hellandgone rather quickly which would tend to be noticed. So the risk of a buggered car alternator going unnoticed for long enough to be used to jumpstart a bike is minimal and even then the bikes battery would need to be pre-fucked to not absorb the short term overcharge.
