Quote:
Originally Posted by Bassthe1st
It could only be a user error like leaving the car unlocked with some accessory running, you know, genuine power draw.
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There's always some accessories running. You might think that the car is 'off', but it's never totally off. Between that and the greatly decreased ability of a battery to hold charge in very cold weather a battery maintainer should not be considered an optional device, it should be considered mandatory.