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      03-18-2022, 08:41 AM   #38
Wires
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Drives: 2016 340i xDrive
Join Date: Apr 2008
Location: Calgary

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Quote:
Originally Posted by cooper rumfelt View Post
I have this same problem, I have went through about 3 batteries within 3 months. if the car is not started within a week or two it will drop to about 4 volts and cannot be charged and the longer the battery stays on the shorter the window gets, for example just had one on for about 3 months and the car went two days without being started and it dropped to 4 volts. I have a go fast bits boost gauge and snow performance meth gauge on the car but they are both wired in to the fuse box and have fuse taps to turn off when the car is off and on when it is on, could one of those be what is draining the battery?
Unhook them and let it site a week to see. If you are actually seeing 4V on the battery, then your battery is probably screwed (unless it's a deep-cycle battery).
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