As to the question in the original post: I still have the OEM battery in my ‘18 SR5, just turned over 40,000 miles. In my neck of the woods in north-central Nevada, summer highs are in the 100-105 range, wintertime lows can and do drop into the teens and 20s below zero.

My experience: The OEM battery in my 2002 Tacoma TRD died in 2009 (I think it was a Panasonic also). I’ve had OEM batteries in GM and Ford new vehicles die in six months. When Sears came out with the Die Hard in the early 1980s, I installed one in my 1970 Ford F-250 4x4 truck and it lasted 15 years.

As stated before, the majority of batteries are made by few manufacturers, who make them to the specs required by their sellers to sell within a set price point. Sometimes you get plums, other times you get lemons. People swore by Optimas, until they sold out to one of the major manufacturers (if I remember correctly, Johnson Controls) thus compromised, and then they weren’t as long lasting anymore. When I worked in the auto parts industry, warranty returns went through the roof.