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      04-13-2022, 08:06 PM   #1
tmoretta
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Dead battery

Had my Z4 M Coupe on a battery tender in my heated garage all winter. Would not start/battery was completely dead. Car started and ran fine with a boost. Car has been on a charger today. The battery is only 14 months old. Could it be the battery needs changing again, or should I be looking for some parasitic voltage loss?
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      04-14-2022, 08:31 AM   #2
wdb
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Perhaps an iffy connection to one of the battery terminals? Having a battery go dead on a battery tender is really unusual. What tender do you use?

You might also want to try posting in the "General BMW Z4 Forum" -- more traffic there.
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