Button batteries are often found in cameras, watches, computing devices, toys, and other areas. And because they take up little space, are lightweight, can provide power for a long time, and are easy to use, is widely used.

However, in many cases, people just use them and throw them away after use. Not paying attention, some types of button batteries can be charged twice and used again. In order to effectively prevent button batteries The consumption of such applications and the possible pollution to the environment, so how do we identify button batteries?

Button battery, press once or twice to charge the battery:

1. Primary batteries. Each has - LR alkaline battery (1.5V), SR silver oxide battery (3V), ZA zinc air battery (1.4V), CR primary lithium battery (3V), etc.

2, 2 secondary batteries. Each has - LIR secondary battery (3.7V), nickel metal hydride battery (Ni-MH), nickel cadmium battery (Ni-Cd), etc.

Various characteristics of button batteries:

Alkaline button battery - the charging and discharging effect is very good, the price is relatively expensive. The allowable capacity is 15mAh140mAh. It is mostly used in electric toys, hearing aids, lighters, watches, etc.

Zinc silver oxide button battery - the leader in button batteries. The capacity is higher than carbon, alkaline button battery. The working voltage has good reliability. (90% of the power consumption, the working voltage is stable above 1.45V; 10% After the power is used up, the high-speed parallel charging and discharging continues.) This type of battery has a very good leakage repair effect and is suitable for high-efficiency applications. It is used in hearing aids, digital cameras, watches, computing devices and other areas.

In addition, for button batteries using "zinc grade" - such as alkaline batteries, silver oxide batteries, and zinc-air batteries, they are likely to contain mercury due to the manufacturing process.

Therefore, you must also observe whether the battery case has signs of mercury content.

The use of button batteries depends on the actual situation and the selection of battery types that are suitable for corresponding environmental characteristics. Try to choose mercury-free button batteries; recycle them effectively and do not throw them away casually to avoid causing air pollution. Primary batteries, 2 Secondary batteries and rechargeable batteries must be distinguished and applied according to valid standards.