Battery OEM Mazda or OPTIMA

I bought a red top optimum for my 2019 forester sport. Have had it in for almost 2 years without issue thus far.

Our household got its first EV earlier this year, mainly for the daily 20-25 km commute form my SO, and it’s been the best car purchase we’ve ever made (only bested by my 3, which made it to 10y w/o problems this year). That “small battery” that once worried us (or more like we intentionally went with the smaller offering)? Barely a drawback - in the summer, a single charge lasts a whole week. This EV has become our go-to for short trips, and while cutting running costs by 2/3 was a big motivator, it’s now just a nice side benefit. I love the torque and started to love the silent driving. especially in a traffic jam.

My replacement was a Blue Top 34M and it's 8 years old. No issues with Optima here.

I've had great luck with the Optima Yellow Top DS46B24R for Gen2.

I've run Optima red tops for years and never had a problem.

Ended up finding a red top in the back of the store at Advanced (34R with 800CCA). If you go with Optima know that it takes some modification with the wiring. I needed to remove a cable tie and relocate one of the positive leads. Outback started right up and is running great.

The optimas (red top) I got in 2019 are still going. They are not the best though just better than liquid.

My 2025 CX-30 battery is already showing signs of dying but I bought the car in April but then had surgery in June and only went back to work today so it sat for long periods and I do leave my dash cam in parking mode. It might come back some after being driven more or it might not.

The OEM batteries are shit. It died around the two-year mark.

My battery died last July at exactly 2,5 year mark. Mazda OEM battery is a cheap trash and so are the replacements too.