Button Cell Battery Brief Introduction

A watch battery or button cell is a small single button cell battery shaped as a squat cylinder typically 5 to 20 mm in diameter and 1 to 6 mm high—like a button on a garment, hence the name. Button cells are used to power small portable electronics devices such as wrist watches, pocket calculators, and hearing aids. Lithium cells are generally similar but somewhat larger; they tend to be called either lithium cells or batteries or coin cells rather than button cells.

Devices using button cells are usually designed to use a cell giving a long service life, typically well over a year in continuous use in a wristwatch. Most button cells have low self-discharge and hold their charge for a long time if not used. Higher-power devices such as hearing aids, where high capacity is important and low self-discharge less so as the cell will usually be used up before it has time to discharge, may use zinc-air cells which have much higher capacity for a given size, but discharge over a few weeks even if not used.


Button Cell Common Manufacturer Code

A code used by China battery manufacturer is AG (alkaline) or SG (silver) followed by a number, where 1 equates to standard 621, 2 to 726, 3 to 736, 4 to 626, 5 to 754, 6 to 920 or 921, 7 to 926 or 927, 8 to 1120 or 1121, 9 to 936, 10 to 1130 or 1131, 11 to 721, 12 to 1142, and 13 to 1154. To those familiar with the chemical symbol for silver, "Ag", this may suggest incorrectly that AG cells are silver. 

Chung Pak Battery Works Limited  professionally manufacturers high quality dry batteries, including cylindrical battery and button cell. Our batteries can also be decided into ——

1. Primary battery (disposable battery), which are designed to be used once and discarded when they are exhausted.

2. Secondary battery (rechargeable battery), which are designed to be recharged and used multiple times. 

Button cells are single cells, usually disposable primary cells. Common anode materials are zinc or lithium. Common cathode materials are manganese dioxide, silver oxide, carbon monofluoride, cupric oxide or oxygen from the air. Mercuric oxide button cells were formerly common, but are no longer available due to the toxicity and environmental hazard of mercury. Cells have a metal can forming the bottom body, with a circular insulated top cap. The can is the positive and the top the negative terminal.

Cells of different chemical composition made in the same size are mechanically interchangeable. However, the composition can affect service life and voltage stability. Using the wrong cell may lead to short life or improper operation (for example, light metering on a camera requires a stable voltage, and silver cells are usually specified). Sometimes different cells of the same type and size and specified capacity in mAh are optimised for different loads by using different electrolytes, so that one may have longer service life, than the other if supplying a relatively high current. 

About Chung Pak —— Large Button Cell Manufacturer & Exporter in China

Found in 1980, Chung Pak is specialized in dry cell battery manufacturing and exporting. Our head office is based in Hongkong, with one battery products manufacturing factory located in Shunde, Guangdong, Mainland China, employing a total of approximately 1,800 professionals of battery products. Our maximum production capacity of present facilities is estimated at 1.8 billion units.

Started as being a battery manufacturer, Chung Pak has now developed to have diversified of paper separator, zinc products, metal plastic parts and tools manufacturing in addition to the core battery products manufacturing business.

We offers famous brands -- "Vinnic Battery" and "Vinergy Battery", which are welcomed by customers from all around the world. Besides, we also offer OEM service. Some well-known brands has become our steady customers. Welcome to visit our factory and cooperate with us.

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