Why do you need to know the production date of a car battery at all?
- Firstly, to monitor its service life. Car batteries have a limited lifespan – usually between 3 and 5 years. Knowing the production date, you can estimate how close the battery is to the end of its service life and when you may need to replace it.
- Secondly, to understand how long the battery warranty will last. The warranty for batteries from some manufacturers starts from the production date, so if you know this date, you can determine whether the battery is still under warranty.

- Thirdly, to check the quality and reliability. Batteries that have been stored in a warehouse for a long time before being sold lose their properties. Knowing the production date, you can avoid buying an old or inefficient battery.
- Fourthly, to plan maintenance. If you know that the warranty period for your battery has already expired, you can plan its replacement or condition check in advance to avoid possible problems with starting the car.
- Finally, if you have purchased a used car and do not know how long the battery has been in operation, knowing the production date of the battery can help you assess its overall condition.

HOW TO DECODE THE SEVEN-DIGIT CODE?
The production date and other technical characteristics of WEZER batteries are put in a special code printed on the lid, which can have either 7 or 13 characters.
Here’s how to decode the seven-digit code:
1st character is the last digit of the year, for example: if the year of production is 2024, then the code will start with number 4;
2nd character is a letter designation of the month: A – January, B – February, C – March, D – April, E – May, F – June, G – July, H – August, J – September, K – October, L – November, M – December;
3rd character is the letter F that indicates the location of the plant where the battery was manufactured;
The 4th and 5th characters stand for the month of inspection, for example, if the month of inspection is October, it will be the number 10;
The 6th character is the number of the shift in which this battery was manufactured;
The 7th character is the HDR-1 Control Line number.
For example, the code indicated on the battery is 9AF1021, which means: the battery was manufactured in January 2009.

THIRTEEN-DIGIT CODE
1st and 2nd characters indicate the forming bath number, designated by numbers from 01 to 20;
3rd character is the shift number in which the battery was manufactured;
4th character is the team number that manufactured the battery;
5th character and 6th character are the number of the week in the year when the battery was manufactured;
7th character and 8th character are the day of the month when the battery was manufactured;
9th character and 10th character stand for the last two digits of the year when the battery was manufactured, for example, 21 means that the year of manufacture is 2021;
The 11th and 12th characters are the digital designation of the design features used in the manufacture of the battery;
The 13th character is the digital designation of the manufacturer.
For example, the code indicated on the battery is 053139292100A, which means: the battery was manufactured on September 29, 2021.
Knowing the production date of your WEZER battery can help you make more informed decisions regarding its use and replacement.