Button cell is widely used in various microelectronic products because of its small size, ranging from 4.8mm to 30mm in diameter and from 1.0mm to 7.7mm in thickness. It is generally used as a backup power supply for various electronic products, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, memory cards, remote controllers, electric toys, pacemakers, electronic hearing AIDS, counters, cameras, etc.
Extended data:
preventive measure
Buckle battery recycling: In alkaline batteries, silver oxide batteries and zinc-air batteries using zinc electrodes, the zinc at the negative electrode can react chemically with the components in the electrolyte, so it will be corroded and consumed, which will not only reduce the available capacity of the battery, but also produce hydrogen gas, which will increase and expand the internal pressure of the closed battery.
In order to suppress this effect, zinc is usually covered with a small amount of mercury, but it will also cause mercury pollution to the environment from waste batteries. Although mercury-free button cell has been listed, due to technical or patent reasons, mercury-free button cell is not popular enough.
Button cell is not within the mercury-free prohibition range of general dry batteries, and a small amount of mercury is still allowed, so it must be recycled according to the instructions of environmental protection units.