How to identify fake button batteries and expired button batteries?

Now button battery is very widely used, therefore, our country those omnipotent, ubiquitous "copycat" also began to act, in order to everyone not to buy fake and expired button battery, and everyone to 81.

Steps/methods

Identify from the battery mark.

They have no trademark, no place of origin, no date of production and no certificate of inspection. They are simply labeled "BUTTONCELL" in English and Japanese on the batteries, giving the appearance of being foreign.

From the appearance of battery

The negative side of the battery is mostly yellow, giving it a "gold" finish. The bottom of the positive shell is prone to rust spots. As above, the battery button surface coating is smooth; the battery back of the black seal ring should not fade.

Identify fake button batteries and expired button batteries

Identify from battery performance.

Most alkaline manganese batteries have a low capacity, usually less than the national standard of 1.55v, and a short service life. Easy leakage of liquid, corrosion of electrical appliances; The voltage load characteristic is bad, the discharge curve of the battery is inclined to drop sharply; Easy to produce gas inflation, cause the battery "belly".

Identify fake button batteries and expired button batteries

Identification of expired button battery: the negative side of the button battery will be marked with two Numbers "**". The first number is year and the second number is month. If the second number is "0, X, Y", it means "October, November and December".

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