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The No. 7 battery is cylindrical in shape, with a height of 43.6 millimeters and a diameter of 10.1 millimeters. It is a common type of battery, smaller than AA batteries. Commonly used in electronic products with small size and low power consumption, such as MP3 players, small remote controls, etc. There are both disposable alkaline batteries and rechargeable nickel hydrogen and lithium-ion batteries.
The general size of the No. 5 battery is 14mm in diameter and 49mm in height. Due to its small size and moderate capacity, it is widely used in many small appliances and digital products.
The No. 5 battery is longer and thicker than the No. 7 battery. Generally speaking, the No. 7 battery is used in home appliance remote controllers, while the No. 5 battery is used in cameras, razors, and wall clocks. The battery models used for toys are quite diverse, it is best to confirm the type of original battery before purchasing.
A battery refers to a device that converts chemical energy into electrical energy through a reaction between the positive and negative electrodes. A primary battery refers to a battery that cannot be charged but can only be discharged, but its capacity is generally larger than that of rechargeable batteries of the same specifications, such as zinc manganese, alkaline dry batteries, lithium button batteries, lithium sub batteries, etc. Batteries of different models cannot be mixed together. Welding on batteries of different models requires the use of connecting pieces for welding. Do not burn or disassemble batteries, as the chemicals inside are corrosive and can harm the skin and eyes. Do not come into contact with acidic gases and avoid approaching sources of fire. Remember to store the battery in a cool, ventilated, and dry environment with a temperature not exceeding 45 ℃.
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