Have a power supply from Huawei with 40 watts and 10V 4A. How much does that mean?
Or how do you generally calculate watts to mah?
For example, in a mobile app that is loaded with 7500mah.
If I take another phone with 18 Watt power adapter and the usual 9V 2A, it is usually loaded with around 3000mah according to the App.
Watt = Volt * Ampere
mah is marmalade hour, that is, without the mini ah, ie ampere hour, and means one ampere for an hour.
something with h behind it is a capacity, such as 30 liters of gasoline.
Watts in the power supply is, so to speak How many liters of gas per hour come from the gas station.
It should be noted, however, that the mah of the battery to be multiplied only by 3.7 volts to get watts (hours), not with 5 as the power supply…
The mAh is an indication of capacity (eg Baterien), you already know.
3000 mAh means that you can draw 3000 ma (3A) for 1 hour, then the battery is empty.
If you have a power adapter with 40 watts and zb 10 V then it can deliver 4 A.
If you charge it for 1 hour, it has delivered 4000 mA for 1 hour.
With it you can load the Baterie. If the battery has 8000 mAh you have to run the power supply for 2 hours (without losses) to charge the battery.
The power supply can supply the 4 A for as long as a power plant supplies power.
It is only "empty" when no power plant is running anymore.
Imagine you have a bucket of 10 liters of water (battery) and from the bucket you take 20 x 500 ml of water within one hour. Then he is empty. But I could also take 100 x 100 ml of water for 10 hours. The result would be the same.
Now we have a power supply, this is not a bucket but a water pipe. You take water and it always comes back to water no matter how long, only the withdrawal amount is limited
