after 10.5 years. I was replacing a burnt headlight bulb this PM on my 2011 Toyota Tundra, and when I tried to start, it barely turned. I checked connections and got ready to jump it when I noticed it was an OEM battery, so I opted to replace it from 710 cold cranks to 750, not taking any chances. Thank God it happened in my garage and not out in the cold/hunting in the MT wilderness. Not too shabby for an OEM battery.