The difference between the capacity unit of lithium battery mAh and Wh

Is there a difference between the capacity unit of lithium battery mAh and Wh? The battery of this Lenovo notebook below is only 5600mAh, which is not as good as three millet batteries in number. Nowadays, an important factor restricting the development of smart phones is the battery of the mobile phone. It can be said that the battery of the mobile phone has been in the same place for so many years, and the functions of the mobile phone are also improving, but the battery life is not a very good solution. This is the reason why the mobile power market is so hot. The size of two mobile phone batteries can be compared with mAh. But if it is not the same type of product, it may be wrong to compare it directly. The reason is that the voltages of the two batteries are different, and it is also because of the voltage, so simply comparing the magnitude of the milliampere is not comparable. The physical meaning of battery capacity is how much electricity the battery can hold or release, usually expressed in Ah (ampere) or mAh (milliampere). According to the meaning of current: Iu003dQ/t, we know that Qu003dIt, the unit of current I is mA (mA), t represents time, and the unit is hour (hour), so our battery capacity unit is mAh. In other words, if the battery capacity is 1000mAh, if the operating current is 100mA, it can theoretically be used for 10 hours. But from the formula, Qu003d does not involve voltage, so this unit only represents the amount of Coulomb charge contained in the battery. But it does not say how much work the battery can do, or what the maximum power the battery can supply. Different types of products have different working voltages. So you will often see a Wh number next to mAh. The work that the battery can do is Wu003dUItu003dUQ, and the unit of voltage U*current I is W (watts), so W in the battery is represented by Wh, which is the work that the battery can do. Distance: The voltage of the 6600mAh battery is 14.4v, 14.4*6600u003d95.04wh, and it can do work 6.6*14.4*3600u003d342144j. The general mobile phone voltage is 3.7, so the above 5200mAh mobile power can theoretically do 3.7*5200u003d19.24wh, 3.7*5.2*3600u003d69264j. Wh is proportional to voltage, current and time. The milliampere hour is usually used as an indicator of battery charging and discharging. It is a target proportional to the charging (discharging) current and time of the battery. To make it comparable or convertible with Wh, the voltage of the battery must be known. Briefly Whu003dmAh/1000*Voltage. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the working principle of the original battery?