ACDelco battery date code labels help vehicle owners and technicians confirm when a battery was assembled and ensure the product is current. Checking this code protects against receiving older stock that may have lost charge during warehouse storage.
This guide explains where to locate the code, how standard formats differ between brands, and how to interpret each segment so you can verify freshness and suitability for your vehicle.
| Code Segment | Typical Meaning | Example | What It Indicates |
|---|---|---|---|
| Month | Production month | R = January | First letter indicates month when the battery was assembled |
| Year | Last digit of production year | 4 = 2024 or 2014 | Number represents the final digit of the model year |
| Plant Code | Manufacturing location | H, F, or two digits | Letters or numbers identify which facility produced the unit |
| Shift/Week | Day of manufacture | M, T, W, or numeric | Optional extra character for shift or week within the month |
How to Locate the ACDelco Battery Date Code
You can find the date code on ACDelco batteries on a small label or stamped directly on the case, typically on the top or side. Use good lighting and, if needed, gently clean surface dust to read the characters clearly without damaging the casing.
Understanding Standard Date Code Formats
ACDelco often uses a letter for the month followed by a digit for the year, though variations exist for different product lines and years. Knowing the format for your specific battery type makes it simple to confirm freshness.
Letter-Month Format
In this scheme, A through L represent January to December, while numbers indicate the last digit of the year. For example, D9 would mean April 2019 or 2009, depending on the decade context and product line.
Numeric-Only and Mixed Formats
Some plant codes use only numbers or combine letters and numbers for plant and week. Always check the seller documentation or official ACDelco guides to confirm which system applies to the part number you are reading.
Interpreting the Month and Year Segments
Match the first character to the month table, then confirm the year digit based on your purchase window and model years supported by your vehicle. This step reduces the chance of installing a battery that has been sitting in inventory for too long.
Key Takeaways for ACDelco Battery Date Code Checks
- Locate the label or stamped code on the top or side of the battery using adequate lighting.
- Match the month letter and year digit to the actual calendar to confirm production recency.
- Cross-reference the plant code with seller information if you need traceability.
- Use the date code together with storage conditions and retailer policies to decide suitability.
FAQ
Reader questions
How do I read a date code like H8 on an ACDelco battery?
H corresponds to August and 8 represents the year digit, so H8 indicates August 2018. If you are in the 2020s, verify whether the digit refers to 2018 or 2008 based on the context and purchase date.
What should I do if the date code looks smudged or incomplete?
Check the side and top of the battery carefully, use a soft cloth to clean light surface residue, and refer to the packing slip or retailer information to confirm the manufacture date before installation.
Can an older date code still be safe to use?
Yes, if the battery was stored properly in a climate-controlled environment, but older stock may have reduced reserve capacity; ask the retailer for the rest date and inspect the state of charge before fitting.
Does the plant code affect performance or warranty?
The plant code mainly identifies where the unit was assembled; performance depends on build quality and adherence to specifications, while warranty terms remain tied to the purchase date and retailer policy rather than the plant code.