How to check the charging power, how to see how many watts the charger has

It can be calculated as follows:

1. The output voltage of the charger is multiplied by the output current, if the output of the ordinary mobile phone charger is 5V-2A, that is, 5X2=10W, the charger will be marked but the maximum output value of the charger end is not necessarily the power of the mobile phone charging, and the actual charging output will change due to the change of the power that the mobile phone can bear. Actual charging power.

2. The work done by the current per unit of time is called electric power. It is a physical quantity used to express the speed or slowness of electrical energy consumption.

Represented by p, its unit is watts.

watt), abbreviation"tile", the symbol is w. As a physical quantity that indicates how fast or slow the work of an electric current is done, the magnitude of the power of an electrical appliance is numerically equal to the amount of electrical energy it consumes in 1 second.

3. If you are in"t"(Si unit is S) the electrical energy "W" (Si unit is J) consumed for such a long period of time, then the electrical power of this electrical appliance is p=w t (defined) electrical power is equal to the product of the voltage at both ends of the conductor and the current passing through the conductor.

1. All mobile phone chargers are actually composed of a stable power supply (mainly a stabilized power supply, providing stable working voltage and sufficient current) plus necessary control circuits such as constant current, voltage limiting, time limiting, and overshoot.

2. The output parameters marked on the original charger (finger line charge): for example, the output output refers to the relevant parameters of the internal regulated power supply. For example, the output can be used for devices, and it can be used for 6V devices.

How to look at the charging power of the phone.

Hello dear friends<>

1.First of all, find the charging head of your mobile phone charger, such as my mobile phone is oppo mobile phone charging head 2Looking for the output of Kaijube to the bottom, you can see that it is 5V-2A or 9V-2A3

The formula for calculating power is the output voltage multiplied by the output current4So the power of my mobile phone charging head is 5 times 2 or 9 times 2 times the mold stool, which is 10w or 18w. You can use this method to calculate the power of your mobile phone, and the charger plug looks at the wattage

1. The wattage is equal to the output voltage multiplied by the output current; 2. Take out the charger plug and write the voltage and current parameters on the socket; 3. If there is a unit conversion, multiply the two numbers to get the wattage of the output power after self-conversion. I hope mine is helpful to you, I hope I can help you. <>

The power of the mobile phone charger can be obtained by the parameters on the charger label, the label of the mobile phone charger is usually marked with the input voltage and output current, the calculation formula of the power is the voltage multiplied by the current, and the power can be calculated by calculation, such as the voltage displayed on the label is 5V, and the current is displayed as 2A, which is usually displayed in the form of 5V2A, that is, the power is 10W.

The output of a mobile phone charger is usually DC.

You can use the formula p=ui, which is the maximum output power.

Rated output voltage Maximum output current, the unit of voltage is V, the unit of current is A, then the unit of power is W. If the unit of current is ma, the unit of power is.

Generally, the input parameters of the charger are basically in the format of "AC100V 240V50 60HzXA", which means that the charger can be plugged into an AC 100V 240V power socket with a frequency of 50Hz or 60Hz.

In the working state, the maximum current allowed to pass through is XA, and the current size of the input hall varies from to different according to the charger model.

The higher the output power supported by the phone charger, the more it can shorten the charging time of the phone. However, higher output power also often leads to a larger charger, which affects carrying it out and about.

The mobile phone does not have a charger that supports much power, only the problem of fast and slow charging, each mobile phone has a matching charger, A1 charges slowly, A2 charges fast. Generally, it is difficult to see only the mobile phone, and it is safest to look at the manufacturer's manual or charge according to the manufacturer's original charger. The manufacturer's support for 18W fast charging is only a theoretical value, and it cannot be reached in practice, in order to protect the battery, it is still the most suitable charger according to the actual distribution.

The charger is generally marked with voltage and current, near the plug, there are generally more 5V2A, 9V3A for fast charging, and the standard configuration is generally 5V2A, and the maximum power is the maximum voltage of the charger multiplied by the maximum current.

The maximum output current of the 10W charger is smaller than that of 18W, and the corresponding charging time is longer, and the power is the voltage multiplied by the current, that is, the corresponding battery capacity. The so-called support for 18W fast charging means that the mobile phone can withstand high-current charging, and the corresponding time is short.

The phone has a current adaptation function. Therefore, when the mobile phone is in 5V 2A charging mode, if you use a 9V 2A charger to charge the phone, the charger will automatically recognize the charging specification of 5V 2A. Another example is that a high-power iPad charger can charge a low-power iPhone, and it will also work according to the current standard of the iPhone.

A low-power charger charges a high-power mobile phone, and it doesn't hurt to have a protocol, for example, iPhone8 supports fast charging, but it is equipped with a 5V 1A charger protocol, which will not affect it. If there is no protocol charger, the charger will be "a small horse-drawn cart" and be working at full speed, causing the mobile phone to heat up and injuring the charger. So usually, don't use a 5V 1A charger to charge 5V 2A and higher power phones.

The charging power can be seen on the charger of the mobile phone or on the outer box of the mobile phone.

First find the location of the charger parameters, generally the mobile phone charger parameters are at the plug pin, find the charger output voltage and output current. If the output voltage is 5V, the output current is 1A. According to the formula:

Power = voltage and current, we can calculate the power of this charger is 5V 1A = 5W.

You can judge whether the mobile phone charging head is fast charging by observing the current, and when the mobile phone is charging, measure the charging current, if the actual charging current is one-tenth of the capacity of the rechargeable battery, it is slow charging, that is, standard charging. If the charging current is close to the capacity of the rechargeable battery or greater than the capacity of the rechargeable battery, it is fast charging.

Summary.

W (wattage) is equal to the output voltage multiplied by the output current; Take out the charger plug and write the voltage and current parameters on the socket; If there is a unit conversion, you can multiply the two numbers by yourself to get the wattage of the output power.

The common EV charger is generally 120W (48V 10 14Ah W (48V 17 22Ah). For electric vehicle lead-acid battery charging, the general charging capacity is multiple of the battery discharge capacity, and then calculated according to the charging voltage, according to the rated capacity of each discharge, power consumption = charging voltage * battery rated capacity *.

The charger for electric vehicles with 48V batteries is suitable for batteries with different capacities (generally from 14 Ah to 20 Ah hours), and its first stage charging current is set to Amp, and the electric power at this time is about 110W; In the second stage (when charging to close to 90% capacity), the charging current is about 1 ampere, and the electric power is about 60W. Until it is fully charged, the power consumption is about 10W when it turns to trickle charging.

Physical Units:

1. SI unit: watt (w) 2. Common unit: 1 kw = 1 103w 1 mw = 1 103kw = 1 106w 1 horsepower = 735w.

Horsepower: The higher the power, the higher the speed, the higher the maximum speed of the car, and the maximum power is often used to describe the power performance of the car. Maximum power is generally expressed in horsepower (ps) or kilowatts (kW), and 1 horsepower is equal to kilowatts. 1w=1j/s。

That's all false bidding, the hype of merchants. In fact, the output power of the mobile phone charger is more than ten watts. If it is 67W, 120W, 140W, then the charging current is tens of amps, and the mobile phone will be charged and blown up into the sky.