View Full Version : Question ECU current draw and battery life, 1 month parked

26-02-2009, 04:27 AM
I've parked my VW Touran for 1 year while I'm in China.
Does anyone know how long you can leave a VW Touran parked before the ECU drains the battery and the car won't start?
OR what is the typical current draw for a VAG ECU?
Assuming a 50mA draw (I've heard this is what Fords ECU's draw), the Touran has a 70+ Ah battery, so this means 70/0.05 = 1400 hrs =58.3 days
Is this right?

26-02-2009, 09:39 AM
Hi, the alarm draws power from the battery and also the clock in the instruments. If you wanna leave-it for soo long, put one off those trickle chargers on it wich get power from a solar panel. Maplin and Argos used to sell them a while ago...

26-02-2009, 10:46 AM
One other thing to bear in mind is that while the battery may be rated for 70Ah, trickle discharges from it have their own inefficiencies so the calculation is not so long. Personally, I'd say if you can't go with adamss24's plan with a trickle charger I'd go with disocnnecting the battery if you can't get someone to give it an occasional run.

26-02-2009, 02:36 PM
Or you can put the vehicle in transport modus,but i don't think even that would help for a years storage