I wanted to share something that caught me completely off guard with my hybrid. I always worry about the big main battery, especially with summer coming, but I had no idea the small 12V auxiliary battery is such a weak point in this heat. Mine died suddenly last week after the car sat at the airport for a bit, and it completely disabled the whole system. A friend sent me a detailed guide that explains why this happens and how to prevent it. It covers everything from the ideal battery types for our climate to the warning signs most people miss. If you drive a hybrid or EV here, it’s worth a read. Learn more here.
