Dead battery

tmoretta · 04-13-2022, 08:06 PM

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?

wdb · 04-14-2022, 08:31 AM

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.

04-13-2022, 08:06 PM	#1
tmoretta Tom 0 Rep 1 Posts Drives: BMW Z4 M coupe Join Date: Apr 2022 Location: Conn. U.S.A. iTrader: (0)	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 dances with roads 4718 Rep 4,096 Posts Drives: '07 E86, '02 996, '95 Seven Join Date: Jul 2015 Location: the perimeter iTrader: (4)	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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