Button cell is also known as button battery (button cell), in general the diameter is larger, and thickness is thinner (relative to the column battery, such as 5 AA batteries on the market). It is actually a lithium battery. Button battery has single monomer and stack distinction in accordance with the appearance, the same battery classification has columnar battery, square battery, shaped battery. More common button batteries are AG3, AG10, AG13 battery used for toys and gifts, CR2032 CMOS battery used on the computer motherboard, CR2025 used for electronic dictionary, CR2016 or SR44 type used on electronic table surface, SR626 and so on. The alphabet letters in front of button cell battery model name represents the type of battery and numbers indicate the size, the first two numbers indicate the diameter, and the latter two mean the thickness.
Button cell applications
Button batteries have been widely used in a variety of micro-electronic products due to their smaller size, the diameters range from 4.8mm to 30 mm, and thickness ranges from 1.0mm to 7.7mm; generally used as back-up power supply of all kinds of electronic products, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, memory card, remote control electric toys, pacemakers, electronic hearing aids counter camera.
Button battery is also divided into chemical batteries and physical battery two categories, among which chemical batteries are commonly used. They consist of (positive) anode, cathode (negative) and its electrical contact liquid. Its appearance of lr44 button cell is stainless steel material, and as a positive electrode, its negative is stainless steel round cover, and there is seal ring insulation between the positive electrode and the negative electrode, the sealing ring can also prevent leakage of the electrolyte in addition to insulation. There are many different types of button batteries, the majority are named by the materials, such as silver oxide batteries, lithium batteries, alkaline manganese batteries.
Pay attention to three aspects to identify shoddy button cell:
1. Recognize from the battery sign. They don't have trademark, no origin, no production date, no inspection certificate, which are marked with “BUTTON CELL" in English, giving the illusion of a foreign-made. 2. Recognize from the battery appearance. Most of shoddy button anode side surface is coated with yellow, giving the sense of being plated "gold". Cathode bottom of the enclosure is prone to rust spots. 3. Recognize from the battery performance. Most alkaline manganese battery capacity is low, usually less than the national standard 1.55V, short life; it is prone to leakage, corrode electrical appliances; poor voltage load characteristics, the battery discharge curve sharply slash downward; prone to flatulence, cause the battery "bosomy belly."
www.battery-products.com is one of the major battery maker and exporter in Hong Kong, China. Our products include carbon zinc battery products, carbon zinc battery products, button cell battery products, lithium button celling battery products, alkaline battery products, nimh rechargeable battery products.
This article is come from: http://www.chinaphoneparts.com/index.php/methods-to-identify-button-cell-battery.htm
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