Battery banjaxed?
 

My V6 has been sitting unused for about a month. When I went to open it tonight the battery was so discharged that I had to use the key to open the door. I attached a 'smart' charger to the battery and it was registering at 4.7 v. I then noticed a regular clicking noise from the fusebox - probably a relay. Any ideas what's causing this? Is it safe to attach a 'fast' charger? I hate to admit it but I suspect the battery is toast!!

Disconnect the battery and charge it for 24 hrs and you'll probably find the clicking noise has vanished (low voltage).

Depending on the age of the battery you should be able to get life back in it. I recently bought a spares or repair which had stood 3 years with a flat battery, charged / discharged a few times, now back in service.

Regards

If the battery was completely flat then a "smart" charger often will not charge it, it will think it's 6v and charge it to that ;)

To charge a completely flat battery you need a normal battery charger and put it on for a couple of hours then swap over to the "smart" charger ;)

Russ

Banjaxed, like it.

I would be surprised for a battery to be that flat after standing for just a month unless there is something draining it down?

If the battery is that flat then you will need a proper battery charger and it may well take a couple of days to fully charge, unfortunately most modern batteries are sealed so you can't take specific gravity readings - these are the most accurate way of checking the status of charge of a lead-acid battery.

I would not use a 'fast' charger, if the battery is very low with a low internal resistance the high current from a boost charger may well damage the battery.

Don't be surprised. Nothing was said about the state of charge of the battery before being left. It might have been on its last legs then.

You can't Assume it was fully charged or anything really.----:shrug:

It's Irish, but of uncertain origin...