3rd October 2007, 18:30
m5board.comoholic (>1000 posts)
Join Date: Jul 2000
Location: London,United Kingdom
M5 3.8 Diamond Black
Thanked 93 Times in 65 Posts
Have had one battery in 8 years,
probably around 3 years ago.
Went for a genuine BMW unit correctly rated too.
Dont use the car much during the week and sometimes its dormant
for a couple of weeks so it sits hooked up to an Oxford optimiser.
This ensures it never looses charge, essential with an alarm & 2 immobilisers!
What I would mention is I specifically avoided a fancy trickle charger
that cycles & does desulphation pulse charging and the like...
as I didnt fancy the cars electronics being subjected to voltage spikes
no matter how low the current...
///M5 the only substitute for capacity is even greater capacity...