Quote:
Originally Posted by Welshkiwi
... If you haven’t yet I suggest you get the battery load checked to find out what it is trying to do under load...
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+1 from me. A lot of comments on BMW forums point to kn@ckered batteries after they've gone flat a few times due to high parasitic drain. Seems they won't hold a decent charge after that.
I've bought batteries from Halfords (twice) and upon insisting that they load check them before I took them away- found that they were duff.
Even on my regularly used car, I keep a solar charger on the dashtop. It slows the sulphation/sedimentation which shorts out the plates eventually and kills the cells.