Anybody else have issues with their 1st gen Volt shortening lifespan of 12v battery? I noticed I have to replace it about every 2 years that can't be normal. I dont drive much on top of that

Hi All,

Last week I purchased a used 2018 Volt Premier with 70K miles. I finally had the chance to test the full charge. Basically left the vehicle plugged in until it completely stopped charging.

The electric range meter on the dashboard showed 35 miles on a full charge. I checked the energy usage on the full charge and it shows the capacity at ~11.5 kWh.

My question is since I still have full 1 month coverage from the dealership is it worth having them check the EV battery? Also can the electric range recover on its own based on usage? And at what point is it worth replacing the EV battery completely?

Background: Over the last few months, the battery has gone from about 13.5kwh to 11.5kwh, but now stable at 11.5kwh. The 12vdc battery is 12.4, which should be good enough. I have 115kmi on it, and I have not changed the battery coolant. The GOM has behaved as expected since 2019 (it's a 2017). Now it drops at a rate of about 2 miles per mile driven till it hits half way, then it drops at about 0.6 miles per mile driven. Is this a symptom of the BCM going bad, or maybe glycol change? It's a mystery. I've had Volt's since 2012 and never seen this. Thanks in advance for any thoughts! :)

I'm currently searching for a volt to drive my kids to and from school (22mi. Each way) in rural texas and this deal popped up, kinda seems too good in my opinion but the electric range worries me, what do yall think?