CynicG

Just wondered as I left mine unlocked on Saturday and the battery is going today. Normally I lock it during the week and its fine each weekend. Perhaps the battery is just reached a low point by coincidence...?

I was wondering if being locked it disables some of the systems that may be dormant or 'ready' when unlocked. Any truth in this?

jsh

Well its funny you should ask cos I read exactly the same thing a couple of weeks ago but cannot remember where !!

Basically it said that modern cars go into hibernation mode when locked and alarmed and shut down all unneeded systems to conserve battery life .

I noticed that if I do not lock my car my battery goes flat quicker than if I lock it.

Dembo

Did you park it the same way round? Because the battery is on the left, if you park it facing south then the left side of the car gets the sun in the morning from the East, and the extra warmth means the battery lasts a little longer.

CynicG

It's in the garage so yes. Is that true?

I definitely think the inlaced car drains noticeably quicker.

flanders

Unlocked drains less, well at least on my car but it's probably due to my Defa alarm.
It was 25-28mA unlocked and 30-38mA locked so in reality the difference is pretty much insignificant