Where Is the Expiration Date Located on a Car Battery? It’s NOT There

You’ll never find the expiration date on a car battery because there isn’t one. Instead, there’s a date of manufacture.

The date of manufacture is the most common date you’ll find. It’s usually printed as a sticker, stamped code, or engraved on the case. Formats vary by brand, but common examples include:

• “B23” = February 2023 (B = February, 23 = 2023)
• “0322” = 3rd week of 2022
• “7KZ” = October 2017 (K = October, 7 = 2017)

There is no true expiration date posted on a car battery. Car batteries don’t have a fixed expiration date because their lifespan depends on:

• Storage conditions (heat, humidity, charge level)
• Usage patterns (frequent short trips vs. long drives)
• Maintenance (corrosion, terminal cleaning, etc.)