According to chemical composition, common button batteries include carbon, alkaline, zinc Silver oxide, zinc air, lithium Manganese dioxide, nickel cadmium rechargeable button batteries, nickel hydrogen rechargeable button batteries, etc. If there is a distinction between single and layered structures based on their appearance. Specifically, carbon based button batteries are the most common and cheapest, while alkaline ones are more expensive, but the discharge effect is good. Both of these voltages are 1.5V, ranging from alkaline AG1 to AG13, with nominal capacities ranging from approximately 15mAh to 140mAh. Suitable for microampere discharge requirements. Widely used in calculators, electronic toys, hearing aids, lighters, watches, and more.

　　The zinc Silver oxide button battery is one of the best button batteries. Voltage 1.55V, capacity higher than carbon, alkaline button battery, high-order discharge curve stable, about 90% of the part always stable above 1.45V, discharge curve almost in a straight line, then quickly power down, voltage drops vertically. The main uses are: calculators, hearing aids, cameras, watches, etc. Specifically, this kind of battery has a particularly good liquid proof effect, and the long-term use effect is also good. I once replaced two domestic Dali AG13 batteries that were placed in the SLR camera to supply power for the Photometric system. It took more than 8 years to replace the new ones, and there was no sign of liquid leakage at all. That's really impressive!

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