Our car straight up died on the road twice, to the point it couldn't be jumped, with my kids in the back seat. Subaru eventually gave us an upgraded battery.
In my car (2021 Mach E AWD with standard battery), the battery state of health the first time I checked it was around 94% at around 48,000 kilometers. I’m not sure how accurate the car’s data is because it seemed to drop a percentage or so immediately after a couple of OTA updates. It sat at around 92% until between 80,000 km and 113,000 km, but now it’s says 92.5% at 120,000 km. Again, I’m not entirely confident at how accurate the car’s information is, but my range is still about the same as when it was brand new. I think I’m past any danger of manufacturing defects, so I don’t have any reason to suspect that the battery won’t easily last a couple hundred of thousand kilometers more.
Of course, you can get a new battery, and I recently had a new battery 80% covered by the dealer, since this is a very well known and documented problem. (My battery was going on 6 years old, so I felt like the discount made it a good time to replace it anyways. The discount was specifically because it is a known issue, and supposedly the new battery is more powerful and “solves” the problem, per the dealer.)
I replaced the battery in my '16 F150 last year - I'd say it had a good run. Went with another OE battery since the original lasted so long.
Sodium ion has about half the volumetric and gravimetric energy density. Li will remain king in the EV space for a long time to come.
OEM Subaru batteries and not the best. When it's time for replacement go with a 3rd party battery.
I had this issue as well, one day the car wouldn’t turn over. Then it would. Then there was no power. Then it would start. Over several days and weeks this would happen. It was explained to me that the Subaru batteries that come from the factory are made to hold just barely enough power to start the car. If that power is diminished in even the slightest degree, like with normal usage in the first 50k miles, then the battery does not have enough charge to do its basic task anymore, rendering it useless. As I understood it, the batteries in the new cars are not up to snuff.
Replacing my battery recently
A new battery at 10k miles.
Battery died around 50k miles.
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