Whr how to convert it to MAh

Roughly this is how wh = mah 1000xv (v is the voltage), why is it roughly like this, but not accurate? Because the v here, that is, the voltage is not constant, take a single lithium-ion or polymer battery as an example, the voltage when it is fully charged is generally volt, and the discharge cut-off voltage is or! In order to get close to the exact value.

The voltage can be averaged, and even then it will not be too accurate, because the discharge curve of lithium battery is not linear, and more than half of the capacity is above half of the voltage).

It can be understood like this: MAH is the unit of capacity, Wh is the unit of electricity, and MAH needs to know the voltage to roughly calculate how much Wh is

WHR is watt-hours, watts are power, multiplied by time (hours), and work is obtained, indicating how much work the battery can do. Battery capacity is also often described as AHR (or MAHR), which is multiplied by the voltage of the battery to get the WHR

P=IU, electronic devices such as mobile phones, tablets, etc. are built-in lithium batteries, that is, 1whr=1.

For iPad4, its battery capacity is, that is, 11486mAh, and the reason why a large-capacity battery is used is to bring a high-resolution screen to bring battery life under high power consumption. Whereas the previous iPad 2 had a battery capacity of 25whr.

The conversion formula wh= v*ah.

Wh: Watt-hour is a unit of energy measurement that represents the amount of energy consumed by an appliance with one watt of power after one hour of use.

mah: milliampere-hour, is a small unit of the main ampere-hour (ah). 1ah=1000mah。

The watt-hour is calculated by multiplying the nominal voltage (V) of the battery by the nominal capacity (Ah), i.e. Wh = V*Ah (the nominal voltage and nominal capacity are usually marked on the battery).

From the formula, it can be concluded that the capacity of 100Wh power bank is 100, 27AH=27000mAh.

How it works. At present, the capacity measurement of mobile phone batteries (like Ericsson mobile phone batteries) is to connect a fuel gauge chip in series on the protection line of the battery, in which the series is connected with an integrated resistor, and the resistance value is generally between 20 and 30 milliohms.

The basic principle is that a sampling resistor is integrated into the chip, and when different currents flow through different currents, different voltage differences are generated, and the chip integrates this voltage (which is actually converted to current) and time to obtain the correct amount of electricity when used by the user (note that the unit of electricity is Mah).

Many chips can achieve this function, and several semiconductor chip companies of TI and Maxim have similar products. After the battery increases this chip, the cost increases, and the mobile phone is also proposed"Communications"requirements. So a lot of phones don't have this feature.

Then, after the chip obtains the capacity through real-time integration, the capacity (in mAh) data is stored in the EEPROM of the chip, and transmitted to the mobile phone through the communication line according to the needs of the mobile phone. Then the phone gets the exact capacity of this battery.

1wh = lithium battery voltage v * ampere-hour capacity (ah) = lithium battery voltage v * milliampere-hour capacity (mAh) 1000;

If yes, then it can be said that the relationship between the discharge time and the current of 26Wh is 26Wh. 2V=, that is, it can be used for hours when it is discharged at a current of 100mA. (In fact, the battery discharge current and time are not simply straight-line).

Definitions:

Wh is the amount of electricity, which is proportional to voltage, current, and time. The MAH is usually used as an indicator of battery charging and discharging, it is an index proportional to the charging (discharging) current and time of the battery, and the voltage of the battery must be known to make it comparable or convertible with WH.

According to the definition of current: i=q t, we can know that q=it, the unit of current i is ma(milliampere), t represents time, and the unit hour(hour), so the unit of battery capacity is mah. If the capacity of a battery is expressed as 1000mAh, if the current at work is 100mAh, it can theoretically be used for 10 hours of power.

The above content reference: Encyclopedia-wh

It can be roughly calculated as follows: wh = mah 1000*v (v is the voltage).

Why is it roughly like this, but not accurate? Because the v here, that is, the voltage is not constant, take a single lithium-ion or polymer lithium battery as an example, the voltage when it is fully charged is generally or, and the discharge cut-off voltage is or. In order to catch the leakage near accurately.

For example, on a disassembled Apple laptop battery, you can see that the marked power is: and the working voltage is. If you want to change it to mAh, the calculation is: , which is about 6559mAh.

What is the difference between the battery capacity units Wh and Mah:

1. Wh means ampere-hour, and mah means milliampere-hour.

2. Wh is a quantity proportional to the voltage, current and time of the grinding section. The MAH is usually used as an indicator of battery charging and discharging, it is an index proportional to the charging (discharging) current and time of the battery, and the voltage of the battery must be known to make it comparable or convertible with WH. <>