How to read a East Penn / Deka battery date code

Decode a battery date code now (runs in your browser).

The rule

A month letter then the last digit of the year. The letters run A to M and skip I (A January … H August, J September, K October, L November, M December). This is a ship date, not a manufacture date.

This is a ship date, so the battery was made a little earlier. Source: Deka "Battery care" poster (Rev 10/03).

Worked examples

Verify the result with the maker or the shop. The year digit repeats every ten years.