What is the battery capacity? How to calculate the battery capacity

Hello, the battery capacity of this phone is 2000 mAh!

First, the most direct algorithm:

First get the current of the consumer, and then divide the battery capacity by the current of the consumer, and the result is the length of time it can be used.

For example, a 3000mAh battery with a rated voltage of 5V can supply power to an electrical device with a power consumption of 2 5W and a voltage of 5V

i=p/u => => =>500ma。

3000mAh, that is, 3000mA current can be discharged for one hour, 3000 500 6 hours.

Second, through the Coulomb algorithm of the amount of charge:

c=is =>3a*3600s =>10800c coulombs (amount of charge).

10800C 5V 54000W electric energy.

54000w／2．5w＝21600／3600s ＝6h。

Battery capacity refers to the amount of electrical energy that a battery is capable of storing. Afterflush oak is usually expressed in ampere-hours (ah) or milliampere-hours (mAh). Ampere-hour refers to the amount of electricity stored when current passes through the battery for one hour, while milliampere-hour is the capacity of the current in milliampere-hours, that is, the amount of electricity that the battery can provide in one hour is milliampere-hours.

The larger the battery capacity, the more power it can store and the longer it will last. When we buy a battery or electronic device, we usually pay attention to its battery capacity. For example, a typical smartphone battery has a capacity of 2000-4000mAh, while a laptop battery has a capacity of about 4000-10000mAh.

It's important to note that battery capacity isn't the only factor that determines battery life. Factors such as the number of battery charges, the charging speed, and the environment in which it is used can also affect the life of the battery. Therefore, when choosing a battery or electronic device, a number of factors should be taken into account, rather than just the battery capacity.

Battery capacity. It is one of the important performance indicators to measure the performance of the battery, which indicates the amount of energy released by the battery under certain conditions (discharge rate, temperature, termination voltage, etc.) (JS-150D can be used for discharge test), that is, the capacity of the battery, usually in amperes.

Hours (abbreviation, expressed in a·h, 1a·h = 3600c).

The battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions, and the battery capacity c is the integration of current i in the time from T0 to T1, and the battery is divided into positive and negative poles.

Generally, battery capacity refers to the amount of power stored by the battery. The unit of battery capacity is "mah", and the Chinese name is milliampere-hours.

In measuring large-capacity batteries such as lead-acid batteries.

For convenience, Beiqin is generally represented by "ah", and the Chinese name is An.

, 1ah=1000mAh). If the rated capacity of the battery is 1300mAh, that is, the current of 130mA discharges the battery, then the battery can continue to work for 10 hours (1300mAh 130mA = 10h); If the discharge current is 1300mA, the power supply time is only about 1 hour (the actual operating time varies depending on the actual capacity of the battery). This is an ideal analysis, where the actual current of a digital device cannot always be constant at a certain value (in the case of a digital camera).

For example, the operating current will vary greatly due to the turning on or off of LCD displays, flashes and other components), so the power supply time of a battery to a device can only be an approximate value, and this value can only be estimated through practical experience.

The storage capacity of each type of battery is the same, which is the rated voltage multiplied by the rated capacity (ampere-hours). For example, a battery with a voltage of 12 volts and a capacity of 10 ampere, 12 times 10 is equal to 120 watt-hours.

Battery capacity refers to the amount of power stored by the battery.

The unit of battery capacity is "mAh", and the Chinese name is milliampere-hour (when measuring large-capacity batteries such as lead-acid batteries, for convenience, it is generally expressed by "ah", and the Chinese name is ampere-hour, 1ah=1000mAh).

If the rated capacity of the battery is 1300mAh, that is, the current of 130mA discharges the battery, then the battery can continue to work for 10 hours (1300mAh 130mA = 10h); If the discharge current is 1300mA, the power supply time is only about 1 hour (the actual operating time varies depending on the actual capacity of the battery).

Usually we talk about battery capacity in ampere-hours, which is based on a certain battery that has been determined.

For example, let's say what is the capacity of the mold pool of this mobile phone stool; What is the battery capacity of this battery car, it is for different batteries. The battery voltage has been determined, and the actual voltage is not considered, so it is only necessary to say that the battery capacity can be represented by the Mengsui Ampere.

However, for batteries of different voltages, we can't simply use ampere-hours to represent the capacity, for example, a 12V 20Ah battery, a 15V20Ah battery, even if they are both 20Ah, the same power load is supplied, the equipment can work normally, but the duration is not the same, so the standard capacity should be in the unit of work.

Battery capacity: The amount of power stored in the battery.

One of the important performance indicators of battery performance is the battery capacity, which indicates the amount of power emitted by the battery under certain conditions (discharge rate, temperature, termination voltage, etc.) (JS-150D can be used to do the discharge test), that is, the capacity of the battery, usually in ampere-hours (abbreviation, expressed in A·H, 1A·H=3600C) The calculation formula of battery capacity C is C= T0IT1DT (the current I is integrated in the time from T0 to T1).The battery is divided into positive and negative poles.

Battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions.

Capacitance c = discharge current (constant current) i discharge time (hours) t discharge time t = capacity c discharge current (constant current) i

Discharge current (constant current) i = capacity c discharge time t

Capacity c Discharge Battery (constant current) i Discharge time (hours) t.

Discharge time t capacity c discharge current (constant current) i .

Battery capacity is one of the important performance indicators to measure the performance of the battery, which indicates the amount of electricity emitted by the battery under certain conditions (discharge rate, temperature, termination voltage, etc.) (JS-150D can be used for discharge test), that is, the capacity of the battery, usually in ampere-hours (abbreviation, expressed in a·h, 1a·h = 3600C).

The battery capacity is divided into actual capacity, theoretical capacity and rated capacity according to different conditions, and the battery capacity c is the integration of electricity and slipstream i in the time from T0 to T1, and the battery is divided into positive and negative poles.

Test Method:

Charge a battery with constant current and constant voltage, and then discharge it with constant current, how much power is the capacity of this battery, storage battery, nickel-metal hydride battery, etc., but lithium battery is not good, it has a minimum discharge voltage, that is, the discharge voltage can not be lower, usually thought to be the lower limit protection voltage.

For example, if the capacity of the lithium battery is 1000mAh, the charging and discharging current is 1000mAh, and the capacity released is the most real capacity of the battery when placed in the maximum voltage of the seepage beam ridge pool of the electric rubber shed.

The above content refers to Encyclopedia - Battery Capacity.

What is the battery capacity? Explain the battery capacity in detail

With the development of science and technology, electronic products have become an indispensable part of people's lives. Whether it's a smartphone, tablet, or laptop, devices are inseparable from the support of batteries. And when buying these devices, consumers are usually not concerned about battery capacity.

First of all, what is battery capacity? Battery capacity refers to the amount of power stored in the battery, which is usually expressed in milliampere-hours (mAh). The so-called one milliampere-hour refers to the time when the current is one milliampere-hour and can work for one hour.

For example, if a battery has a capacity of 1000 mAh, it means that it can operate for 1000 hours at one milliampere.

Now that we understand the concept of battery capacity, we need to understand how to calculate the operating time of the battery. In fact, the working time of the battery is also affected by some other factors, such as the power of the device, usage, and so on. Therefore, it is difficult to come up with a general calculation method, but in general, it can be calculated according to the following formula:

Operating time = battery capacity and power consumption.

where power consumption represents the power consumption of the device in an hour. So, if a device consumes 1 watt-hour of power per hour, a 1,000 mAh-capable battery can support the device for 1,000 hours.

In addition, it is also important to note that battery capacity is not the only measure. Under the same capacity, the stability of the output voltage of the battery will also change due to the influence of internal chemical reactions and other factors, which will affect the use effect of the device. Therefore, when buying electronic products, in addition to paying attention to battery capacity, you also need to consider the quality of the battery, brand and other factors, and a comprehensive choice is a wiser approach.

In conclusion, battery capacity is one of the important factors that affect the usage time and battery life of a device, and consumers must seriously consider it when buying a device. From the above, we know that the formula for calculating battery capacity is relatively simple, but there are still many other factors to pay attention to when choosing the right battery. Only after comprehensive consideration can we obtain better results.