Battery Draining.

[benny3008]

My kawasaki er-5 battery keeps draining, it all started when I washed the bike the other day and put an aux socket on the battery, ran fine until the next day pulled over and wouldn't start. Got it jump started after notiong the auxhillary charger metal bit was very close to the negative terminal. and away I went, got home after a 10 minute ride, tried restarting bike. Just got the clicky noise coming from the battery. Jumped it again and left it running for about 45 mins and attempted restart, no luck. Have had battery on optimiser until full health showing, been fine for one day then today it died on me again, have done research and tested alternator from battery terminals using a multimeter, voltage doesn't change between not being running and then idling and revving too. Just stays at around 12.42v most of the time. Have been told this is either alternator or regulator/rectifier. Are there any fuses that I could try first that could have been blown by either the aux charger or by water as a result of washing the bike. I did spray water in the direction of the rectifier so connectors would have got wet. Any advice welcome. TIA

[SirOracle]

Can you remove the new aux.socket that you recently fitted and see what happens then.

[benny3008]

Have already removed the socket and recharged the battery but after a few rides, the battery was flat again.

[whiskeryron]

Hi benny, suggest new battery ( most probably a dead cell).

WR.

[sunny-dave]

'Optimiser' is a battery charger designed for keeping a battery a full charge, methyl.

Commonly used by bikers (and classic car owners)in the UK.

[sunny-dave]

Very useful these days - alarm systems, clocks and other stuff we never had 'way back when' can flatten a battery in a few weeks of 'garage time'.

[benny3008]

Thanks for all replies. Have tested the reg/rec which has come up as faulty so replacing it tomorrow in the hope that the alternator hasn't failed also. :-/