Detailed explanation of battery voltage and capacity

In electricity, the concepts of voltage, capacity, etc. are commonly used to measure the properties and performance of individual batteries. Generally, the rated voltage of a single dry battery(including alkaline batteries) is 1.5 V, nickel-cadmium batteries and nickel-metal hydride batteries are 1.5 V, and lithium-ion batteries are 3.6 V, (Some manufacturers produce lithium ion batteries with a rated voltage of 3.7 V) equivalent to the voltage obtained by three nickel-cadmium or nickel-metal hydride batteries in series, and some common non-rechargeable lithium batteries have a voltage of 3V.

Capacity refers to the size of the battery storage power. The unit of battery capacity is "mAh" and the Chinese name is milliamh(when measuring capacity batteries such as lead batteries, for convenience, "Ah" is generally used, and the Chinese name is Anshi. 1Ah = 1000mAh) For example, the rated capacity of a battery is 1300mAh. If 0.1 C(C is the battery capacity) is used to discharge the battery at a current of 130mA, the battery can continue to work at 10h if the discharge current is 1300mA. The power supply time is only about an hour(the actual working time is somewhat different due to the individual differences in the actual capacity of the battery). This is an ideal analysis. The current of the digital device can not always be set at a certain value when it is actually working(in the case of a digital camera, the operating current will change greatly due to the opening or closing of the display, flash, and other components). Therefore, the power supply time of a battery can only be an approximate value, and this value can only be estimated by practical experience.

Since the voltage and capacity of a single cell are very limited, it is generally necessary to use several cells to form a battery to meet the actual power supply needs of different equipment. In a digital camera, the most common type of battery combination is tandem, that is, the positive and negative ends of the cell are connected. If the cells are connected in series, they form a battery with a voltage of capacity; In notebook computers, batteries generally use hybrid methods, that is, Tandem and parallel.

The page contains the contents of the machine translation.