Battery Tesla or OEM Subaru

Wife’s Ascent had a factory battery that last maybe 2 winters. Replaced it was a yellow top and haven’t had any problems since. Subaru even gave us credit for it so that was nice

I had a 12v battery give me a low voltage warning and they just came around and changed it.

It's a Tesla thing.

Tesla doesn't keep a buffer zone at the top end of the battery. 100% means 100% in a Tesla. Tesla advises to only use 100% when you need the extra range.

My tesla model y recommendation is 90%. I know lfp batteries are recommended to do 100% at least weekly. We do 90% but drive the car about 100 miles every work day so it doesn't even sit at 90% for very long, maybe 3-4 hours.

I only just replaced the Subaru branded battery a couple weeks ago with another Subaru battery. It comes with a 30 month warranty and supposed to have a 55 lifespan.

Any tips or advice before I fork out money for a new battery? I have some anxiety hoping its not the alternator dying, or less likely the starter. All things point to a slowly dying battery but I want a second opinion.

I had Subaru batteries last me only 2 years in upstate NY. I kept getting them for free under warranty. I probably got 4 this way. Finally, the dealer said your alternator is bad and that's why they are going bad (completely bogus). I started going to a local mechanics soon after that and they told me that super OEM batteries are complete garbage.

I have a 2019 Subaru outback. The battery dies every two months and I am left stranded.

The OEM battery sucks I upgraded mine to an AGM with an extra 100 or so CCA. A better battery will also let your auto start stop last longer. Stock battery would never last a stop light for while under load new battery gives me a lot more time even under load.

My battery keeps dying if I dont use my car for 1-2 days and Subaru is failing to address the issues.