How long is the shelf life of a 3V button battery? Button batteries are also called button batteries, which are batteries that are the size of a small button. Generally speaking, the aperture is larger and the thickness is thinner (compared to cylindrical batteries such as No. 5 in the market) AA and other batteries). Button batteries are distinguished by their appearance. Batteries that match the same type are classified into columnar types. Batteries, square batteries, special-shaped batteries. The shelf life of button batteries of different models is generally about 5 years, and some can be as long as ten years. As for the production date of button batteries, generally button batteries have production Date, but most domestic batteries do not have time stamped on them, only imported ones will.

1. Identify from the appearance of the battery

Most of the surface of the negative side of this battery is plated yellow, giving people a "gold" feeling. The bottom of the positive side of the casing is prone to rust spots. As shown in the picture above, the surface coating of the genuine 3V button battery is smooth and clean. , the black sealing ring on the back of the battery should not be discolored.

2. Identify from battery characteristics

Most alkaline manganese batteries have low capacity, which is generally less than the industry standard 1.55V, and have a short service life; they are prone to leakage and corrode household appliances; their voltage and load characteristics are poor, and the battery charge and discharge curve shows a steep slope; it is very easy to Causes flatulence and "bulging belly" of the battery.

3. Identify from the battery label

In order to avoid counterfeit and shoddy button batteries and expired button batteries, we can identify them from the battery labels. They have no trademarks, 2 have no origin, 3 have no production date, 4 have no inspection certificate, and only have English "" on the battery. BUTTONCELL" and Japanese, giving people the illusion of being made abroad.

4. Identification of expired button batteries

There are two numbers "" on the negative side of the button battery. One number is the year, and the second number is the month. If the second number is "0, X, Y", it means "October, November" ,12 months", the battery needs to be replaced after the shelf life is exceeded.

The above is the professional knowledge about the shelf life of 3V button batteries.