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Anyone else install an Odyssey battery? I ordered this one back in November of last year. This week, my engine barely turns over and struggles to start. I checked the battery voltage and the reading at rest was 7.5V-9.7V. With engine running it jumps up to 14.7V. I have been using a CTEK battery charger to keep the voltage up but if I don't plug it in every night, it'll get very low again and I'm afraid it will strand me. Even if I unplug the battery for a couple hours, the voltage will drop to 11V and the car is not even locked.
I brought the car to a BMW specialist to check for a parasitic draw and everything checked out fine. They did say however, that the Z4 requires a 90 amp hour battery and this one is only 80? I couldn't find the stat on that, is that true?
Working on an exchange/warranty return but I'm baffled. Odyssey are supposedly good batteries, and I ordered the H7 - the bigger battery.
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