Common sense of buying a watch battery

The zinc-manganese batteries sold on the market include alkaline zinc-manganese batteries and ordinary high-power cardboard zinc-manganese batteries.

Cylindrical zinc-manganese batteries can be classified into paste-type zinc-manganese batteries and cardboard-paper zinc-manganese batteries due to the difference in separators. Among them, cardboard zinc-manganese batteries are different in electrical properties due to differences in formulation composition, and are also classified into C-type cardboard batteries, also known as high-capacity batteries; P-type cardboard batteries, also known as high-power batteries. High-power cardboard zinc-manganese battery, such as: R6P, the battery has a large discharge capacity, good anti-leakage performance, and can discharge continuously at high current. High-power cardboard batteries are cheap (currently priced at around 0.8 to 1.5 yuan), and small batteries also have a shelf life.

On the outer packaging of the food, the date of manufacture and the shelf life are essential labels. Most people will carefully check whether the food is in the shelf life when purchasing food. However, when buying a battery, few people will pay attention to whether the outside of the battery indicates the date of manufacture and the expiration date. When purchasing, ask more questions: "Is this battery expired?"

According to the relevant personage of China Battery Industry Association, the shelf life of ordinary batteries is generally 2 years, and the shelf life of alkaline batteries is generally 3 years. But many consumers don't know about it. According to the survey, 70% of consumers have no concept of the shelf life of the battery, so everyone needs to pay attention to this aspect and protect their own interests.