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

The battery is VARTA H3 Silver Dynamic 100Ah with the following embossed letters in the upper right corner read:

H3C55705 0466 (uncertain of 66) 536079

It also has characters etched/embossed in the left upper corner:


With that data how do I find when the battery was produced? It is manufactured by Johnson and probably sold in the EU (with requirement of batch number). Is it the same standard as Bosch? (If so, according to another, old thread here) it should be manufactured september 2015 (557).

Any ideas? Tips? Thanks!

4 Answers 4


So, I emailed Johnson Controls as well and they answered me:

Good Morning Ulf, I can confirm your battery was manufactured on Sept 2015.

Kind regards Controls Power Solutions EMEA

So, I was right in my guessing and Johnson Controls (the manufacturer) probably has the same stamps for their batteries produced for VARTA and BOSCH. I followed this guide from an older StacExchange thread: https://mechanics.stackexchange.com/a/35523/40744

The key thing is to know what to look for. Batteries sold in the EU must be permanently marked with a means for manufacturers to identify production batches (if needed to recall a defective batch). This requirement does not extend outside the EU, but as many manufacturers have no idea where batches may end up being sold, most arrange for batteries to include the information either explicitly - often on a label stating clearly the year/month the item left the factory - or in a code which is sometimes buried in a lot of other numbers.

A genuine Bosch silver Battery has a very long number laser etched into the case - such as GBC1110330337 290A 24 Ignore everything on the printed labels. With batteries what matters is the number laser etched or physically melted as a string of numbers/letters into the case. To find the month of manufacture ignore the first three letters (GBC) it is the next 3 numbers which will identify when it left the factory. Then look up the three digit code here - http://aa-boschap-ru.resource.bosch.com/media/commonly_used_media/parts/repairs_and_service/_01072015.pdf


Assuming that the 0466 is a Julian date code which is quite common within production facilities including that in the automotive field. The first three digits represent the day of the year and the fourth digit represents the year.

046 = the 46th day of the year or February 15 and the fourth digit 6 =2016

Of course there are numerous other codes used as well. Here is a link that might help.


  • Interesting. I got the following answer from VARTA Automotive when asking them on Facebook: - "Hello! Sorry, but the date of production codes of our batteries are encoded and are only used for the internal tracking of the batteries. Please understand that we do not give out the decoding code to end consumers. Furthermore, the code only tells you when the battery was build, but not when it was filled with acid and charged. " I also contacted a reseller, who said "According to your code, your battery is manufactured may 2010". Without explanation thought. Confusing...
    – ulflun
    Aug 13, 2018 at 18:27

I've just bought a silver dynamic battery and underneath the battery the are 2 imprinted dials with mine pointing at 6 and 19. I assume June 2019.

  • That may only be the date the case was cast...
    – Solar Mike
    Jan 31, 2020 at 16:06

I have bought Bosch/Varta agm battery (part numbers are identical). It has been made by Clarios in Germany (JCi has sell battery business). Serial number is long digit only string without former three letters in the beginning. Into the top cover has printed 4 letter code (HZTJ) but can't find any hit for decrypting.

Into bottom of plastic shell there are casting codes from the mold. It consist two part 19 - 22 for year and 1-12 months "clock". The shell of my battery has made at feb 2020.

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