Battery drains

MarkS · 19th January 2020, 15:48

At an estimate, a half charged 70Amp hour battery (=35Ah) would discharge with a current of 0.09 amp in ~ 390 hours (35/0.09).

As you state your battery is going flat in several days (~48 hours), I would say that your standby current, (while higher than it should be), is NOT responsible for your battery going flat in several days.

Personally I would suspect the wipers wiping when it gets sufficiently damp. It has the necessary current consumption to flatten a battery in the timescale mentioned, leaves absolutely no evidence, unless actually witnessed, and is known to happen. Personally I would remove the wiper fuse overnight, and see what happens.
But I am open to other ideas.

19th January 2020, 15:48	#20
MarkS Gets stuck in Rover 75 Diesel Tourer, called Perseverance Join Date: Nov 2011 Location: Bournemouth Posts: 664 Thanks: 189 Thanked 157 Times in 108 Posts	At an estimate, a half charged 70Amp hour battery (=35Ah) would discharge with a current of 0.09 amp in ~ 390 hours (35/0.09). As you state your battery is going flat in several days (~48 hours), I would say that your standby current, (while higher than it should be), is NOT responsible for your battery going flat in several days. Personally I would suspect the wipers wiping when it gets sufficiently damp. It has the necessary current consumption to flatten a battery in the timescale mentioned, leaves absolutely no evidence, unless actually witnessed, and is known to happen. Personally I would remove the wiper fuse overnight, and see what happens. But I am open to other ideas.