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Old 03-15-2016, 04:29 PM   #4
dghii
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Join Date: Sep 2008
Location: Florida
Posts: 2,498
Happened to anyone else? Yes! If your battery decides to crap out completely, your jump box will not work if connected in parallel. It may work if your dead battery is disconnected and your fully charged jump box is connected to your battery leads.

In January of 1999 I leased a new Z3. In the spring of 2000, I was picking up one of my boys after school and upon getting back in the car, the battery would not even give a 'click'. I couldn't believe I had a bad battery after just a little of over a year. We caught a ride home and I took the battery out of my 84 Alfa and installed it in the Z3 and the car started right up. As the BMW was under warranty, BMW insisted on having my car flat bedded an hour away to replace the battery as opposed to simply reimbursing my for buying a battery locally...
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