Normally my Z4 stays in the garage until the weekend. Then I started
driving it every day to the P.O. and back (10 mrt). Then one day it didn't
start. I took the battery to the parts store and they checked it out for
an hour. It was O.K. Then I contacted the BWM shop and took it in. Again
it checked out O.K. The mechanic asked about my driving habits. He said I
had a bad driving profile. The battery would be drained a little during
non-use and more upon start-up. I was not driving far enough to charge it
back up. He said he has had this discussion with people who buy a new 7
Series and come back a month or two later complaining about a dead battery.
Anyway, I bought a trickle charger for $70. I connect it and it "tops
off" the battery every 2-3 days.
Never mind the battery - it kills an engine never getting to full working
temperature. Which it won't in five minutes regardless of what the temp
I have a charger bought from Lidl for 12 GBP. Charges the battery then
switches to a maintenance charge which can be left on indefinitely. Small
enough to just about fit in the pocket, but powerful enough to charge a
flat battery overnight. Very handy for my other car which doesn't get as
much use as my BMW.
*Money isn't everything, but it sure keeps the kids in touch.
Dave Plowman firstname.lastname@example.org London SW
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.