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I have a hard time finding when my car battery was produced - can't find any defintive information.

The battery is Bosch Silver with the following data printed: 5EN in huge letters and two rows of digits and numbers. The upper row reads

12V 55Ah 420 A(EN)

and the lower row reads

555 065 042   0 093 S55 51T 

The embossed letters in the upper right corner read


With that data how do I find when the battery was produced?

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Not sure if this is right: Battery Date Codes, it's out dated.

The code is a string of letters numbers, but all the real information you need is in the first two characters. Usually, the code starts with a letter that corresponds with the month--'A' for January through 'L' for December (some manufacturer's codes omit 'I'; for them, 'M' indicates December). The second character of the code is a numeral that stands for the year. Thus, a code starting 'A2' indicates that the battery was shipped in January 1992; 'B2' indicates February 1992, and so on. (Delco reverses the letter and the number; a Delco code starting with '2C' indicates the battery was shipped in March 1992.)

Second source, which might be better: How old is your customer's battery? (It's a pdf)

Check both to see if they have what you need.

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I believe this to be correct.


6 means 2006, 88 means 8.month = august, 22nd day of, etc

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actually you will read only the first 2 digits from this code "G5B6882230170" first digit means the month starting with A -> January and ending with L or M (as some of the manufacturers omit the letter I) for December and the second one "5" is the year of production.

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