Battery OPTIMA or OEM Mercedes

I have a 10 year old yellow top Optima (not even the nicest thing out there) that starts a 440 (often 9 months between starts) every time. I haven't even put a tender on it in the last 5 years.

Optima yellow top. It's around $300 ish. The last one was replaced after a decade. The new one I have will probably be the last one.

Everyone's suggesting things that might save you half a percent or so, but no one has pointed out that by driving at 80mph, you lose *around 30% more battery* than if you were doing 70mph over the same distance

Yellow top , my recommendation ; I do carry multiple lights on the taco .size 35

I ran a yellow top Optima in my Civic from 2009 up till this year. A hell of a run!

For my Mercedes sprinter I had the same battery in it for 10 years. I went and bought it at the dealership. Since the last one lasted 10 years. I shouldn’t have a problem with it.

Mind you this throttle body is brand new.

I don’t have an AMG, but a 2024 CLA 200d and having battery drain problem is annoying to say the least and haven’t even had the car for a month when it all started happening. It’s been at the dealer for the past 3 days and no voltage drop there. They gave me the signal blocking key case and they upgraded the software and still can’t find the problem. Third visit in the month and new battery installed too.

same issue with daily driver 2021 E63. In this case though, the car doesnt give me a warning as much as the Mercedes app on my phone - it alerts to low battery -even critically low, but when I get into the car it starts and there is no message.

Optima batteries have, in my experience, gone downhill over the last few years. For their price, I don’t think they’re worth considering.