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BMW here. No issues.
Yellow top is/was a hybrid cranking/deep cycle battery, once popular for putting big stereo systems in cars because it could handle the discharge cycles of running the system without them engine running.
Tried them all at some point and whatever BMW OE does to those they last 2-3X longer. I literally just replaced a 14 year old battery last September….fuckin insane longevity with the OEM ones.
Ive been using a yellow top for around 5 years in my CRV with no issues
had one in a car that rolled 4 times and it’s still working
Get a OPTIMA Yellowtop D35 Like I Did, I've Never Had Any Startup Issues Eversince, I Actually Regret Not Buying One Before I Spent $120 For a Battery Tender Jump Box From Amazon.com
I had a Red Top Optima battery, but it’s so dead that even my NOCO AGM charger won’t recognize or charge it.
All since lifespan has been 2-3 years. I only sell them at customer request…
Bought a yellow-top that only lasted 3 years.
I went through 3 red tops within 2 years because of bad cells.
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