The two cannot be directly converted and compared. Because the milliampere is the unit of current. wh is the watt hour, which is a unit of electrical power. Since these two dimensions are different, there is no ratio relationship.
If you need to convert: 1W·h=1V·A·h=1kV·mA·h=1kV mAh. Calculating the lithium battery voltage based on 3.7V, the energy of a 4830mAh lithium battery should be 3.7V × 4830mAh = 17871V · mAh = 18 kV · mAh = 18 Wh.
Detailed information:
Current is the flow of a group of electrical chargesics. The size of the current is called current intensity, which refers to the amount of charge passing through a certain section of the wire per unit of time. The expression I = q/t, the amount of electricity passing through one coulomb per second is. called "ampere" (Ampere). The Ampere is a base unit in the International System of Units.
Ohm's Law: R=U/I, R represents resistance, I represents current and the amplitude of R. is equal to U has nothing to do with I, only the material himself. You can use U
and I to detect the size of R. >Reference materials:
Baidu Encyclopedia - Milliamperes< /p>Watt-hours and milliamp-hours are not the same. They can be converted directly because they are voltage related. , but there is a conversion relationship between watt-hour (Wh) and milliampere (amh).
The details are as follows: Wh is related to voltage, current andtime. A quantity that is directly proportional. . mAh is generally used as an indicator of battery charging and discharging. It is an indicator directly proportional to current and time. So, in order to make the two values comparable, you need to know the relationship between mAh and Wh. : Tension.
To keep it simple, you can use this conversion formula to relate the two values: Wh=mAh/1000×Voltage. For example, the rating of a cell phone lithium-ion battery. The voltage is 3.7 V and the capacity is 2000 mAh. Once converted to watt hours, it is 0.54 Wh.
Detailed information: < /strong> Factors affecting battery capacity (1) Effect of discharge rate on battery capacity The capacity of lead acid battery decreases as the discharge rate increases, i.e. discharges electricityThe greater the rate,the lower the calculated battery capacity. For example, a 10 Ah battery can be discharged for 2 hours at 5 A, or 5 × 2 = 10; it can then only discharge 47.4 minutes, or 0.79 hours, when discharged at 10 A. Its capacity is only 10 × 0.79 = 7.9 amp-hours. So, for a given battery discharged at different rates, it will have different capacities. When we talk about capacity, we need to know the hourly rate or discharge rate. To put it simply, it means the amount of current used to discharge. (2) The impact of temperature on battery capacity Temperature has a greater impact on the capacity of lead-acid batteries. Generally, as the temperature decreases, the capacity decreases. The relationship between capacitance and temperature is as follows: Ct1= Ct2/1+k(t1-t2), t1t2 are the electrolyte temperatures respectively. k is the coefficientof capacity temperature, Ct1 is the capacity (Ah) when the temperature is t1, Ct2 is the capacity (Ah) when the temperature is t2 In battery production standards, a temperature is usually specified as the rated standard temperature. , for example, t1 is specified as the actual temperature, t2 is the standard temperature (usually 25 degrees Celsius). The negative plate is more sensitive to the influence of low temperature than the positive plate. As the temperature of the electrolyte decreases, the viscosity of the electrolyte increases, the ions are subjected to greater resistance, the diffusion capacity decreases and the resistance of the electrolyte also increases, this which increases resistance to electrochemical reaction and some lead sulfates cannot function normally. The charge acceptance capacity decreases, resulting in a decrease in battery capacity. Reference documents:
Reference materials: < /p>Baidu Encyclopedia - Battery Capacity
Reference:
Baidu Encyclopedia - Battery Capacity