How to Check the Production Date of Fengfan Battery?
3 Answers
Fengfan Battery's production date can be checked on the surface of the battery, which consists of a series of Arabic numerals and English letters. For example, a Fengfan battery labeled as 4A0735331: 1. 4 indicates production in 2014. 2. A represents January (A is January, B is February... L is December, and so on). 3. 07 stands for the 7th day of the month. 4. In summary, this battery was produced on January 7, 2014. 5. The following 35331 identifier refers to the production unit code and team serial number. Notes for purchasing batteries: It is best to buy batteries from official channels, as there are some small factories in the market that recycle old batteries. The production dates marked on such batteries are basically unreliable, not only lacking good quality assurance (durability) but also lacking overvoltage and overcurrent protection, posing certain safety hazards during charging.
I usually enjoy researching car accessories, and the production date of Fengfan batteries is quite easy to locate. There is a raised code on the top or side of the battery, where the first two digits typically represent the year—for example, 23 stands for 2023. The following letter indicates the month, with A to M corresponding to January to December. For a practical example: if you see a code like 23D12567, it means the battery was produced in April 2023. Some newer batches may include a small triangular arrow symbol next to the date code. A key reminder: if the production date exceeds two years, the battery's activity will significantly decline, especially in summer heat, which can cause electrolyte evaporation. Last time I replaced a battery, I noticed the date was smudged and had to wipe it clean with a damp cloth to read it. I recommend bringing a flashlight when purchasing a battery, as the small print may be hard to see from certain angles.
When servicing cars, I often help customers check battery dates. For the Sail brand, the pattern is quite consistent. First, look for the laser-engraved code on the battery casing, usually around 12 digits long, with the first three being most critical: the first two digits represent the last two digits of the year, and the third letter indicates the month (A for January, L for December). For example, a code starting with 21B means it was manufactured in February 2021. Some newer models now have a date label printed on them, with black characters on a white background making it very noticeable. An important tip is to pay extra attention to the date when replacing batteries in winter, as older batteries over three years may not provide sufficient cold cranking amps. Last week, a customer's car wouldn't start, and upon inspection, the date code was covered in grease. After spraying some carburetor cleaner, it became clear it was an old battery from 2019.
