Battery OEM Chevrolet or OEM Subaru

We've been driving two EVs, a 2012 Leaf since Dec2011 and a 2017 Bolt since Sept 2017.

In the Bolt we lose about 40% range at -20 and lower. Bu the range is so good to begin with its not an issue.

So we bought a new 550CCA battery and installed it and it started right up. When I pulled the 18 month old OEM battery out, I was shocked at the CCA rating: 356. 356!!!! That's insane.

Subaru batteries aren't great in the cold either

My battery made for Subaru died on my 2017 Forester 2 weeks before the warranty ran out. SUBARU has their own problems with their batteries.

Subaru batteries suck