I let the battery charge fully overnight (12.49V) took the negative cable off in the morning (8am). Just got home (5pm), attached the negative cable back on and the volts dropped to 12.32V. Car started without hesitation.
This is on the old battery? That is a large voltage drop unhooked for sure, much worse than my 18 yr old E21 battery.
Hopefully the new battery solves the issue, otherwise there’s be some more diagnostics to do. I’m personally skeptical of another issue but I’m always skeptical.
Did you look for a 25% coupon for AA?
IME one of their flooded batteries is going on almost the same life as 2 BMW batteries in my car. FWIW.
Sent from space