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Thread: E30 battery killed.

  1. #1
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    E30 battery killed.

    Bought a 325e. When i bought it it didnt run. Just turn over. I could turn it over for however long i wanted. It didnt die. I took thr fuel rail off to drain the old gas. Threw it on. Grabbed the battery fresh off the charger. Went to start it. Clicked and killed the battery completely. Hooked up cables to my truck. And that made it able to turn over. But nothing still. What im worried about is how it killed the battery instantly. If i wiggle the negative wire itll spark slightly.

  2. #2
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    Lead acid batteries don't like being fully discharged. Chemistry permanently damages the lead plates when the battery is at or near fully discharged.

  3. #3
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  4. #4
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    Nothing will immediately deplete a lead acid battery except an explosion. It likely was connected poorly based on sparking when jiggling a wire and didnt have much life left to begin with. It needed to be charged very very slowly on a "smart" charger to desulfate the plates inside the battery, anything else will make it worse. Get a new battery

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