Any diy car mechanics here?

[woody1]

Out of curiosity, I put the trickle charger on a mains power meter. It's drawing 2W, which works out at 2*24*365/1000 = 17 units/year, which @34p/unit is £6/year.

For six quid a year, I think I'll stick with what's been working for over 10 years.

[DoctorStrangelove]

Modern cars I'd agree. A 2007 Audi? I doubt it. Hardly bristling with high end tech. I'd expect you could leave that for weeks and shouldn't have a problem.

My 97 Corolla had a permanent drain of 600mA with everything "off". So I designed a thing that charged the battery back to 13.8V when it had droped to 12.8V or so, mostly so I didn't have to figure out what was actually wrong with the thing.

It worked well for years until the battery eventually died.

[woody1]

My 97 Corolla had a permanent drain of 600mA with everything "off". So I designed a thing that charged the battery back to 13.8V when it had droped to 12.8V or so, mostly so I didn't have to figure out what was actually wrong with the thing.

It worked well for years until the battery eventually died.

14Ah per day. It would have been touch and go leaving that at an airport if you went on holiday, even for a long weekend.