Does the charging speed of a mobile phone depend on the charging head or the charging cable? Finally figured it out →

Does the charging speed of a mobile phone have to do with the charging head or the charging cable?

The answer is, both are relevant.

Once you figure this out, you’ll know how to make your phone charge faster.

1. How does the charging head affect the charging speed of the mobile phone?

The charging head is also called a charger or power adapter. It determines the output voltage and output current. The product of the two values ​​is the output power.

Generally speaking, the higher the output power, the faster the charging speed.

Output power P = voltage U × current I

For example, under the same power consumption, a charging head with an output power of 66W (11V 6A) will charge faster than a charging head with an output power of 25W (10V 2.5A).

2. How does the charging cable affect the charging speed of the mobile phone?

The charging cable is responsible for transmitting current. Generally speaking, the higher the transmission current, the faster the charging speed.

According to the resistance formula, the thickness and length of the charging cable will affect the size of the transmitted current.

The thicker and shorter the charging cable, the smaller the resistance and the faster the charging speed;

The thinner and longer the charging cable, the greater the resistance and the slower the charging speed.

Resistance R = resistivity ρ × charging line length L ÷ charging line cross-sectional area S

If you want to know exactly how fast a charging cable charges, you can directly look at the current value marked on the product .

3. Impact of charging protocol on charging speed

In addition to the charging head and charging cable, the charging protocol will also affect the charging speed of the mobile phone.

The charging protocol is a set of charging standards developed by an enterprise or group, which actually stipulates the output voltage, current, power, etc.

The charging protocol is like the "connection code" between the charger and the mobile phone. Only when the "code" is correct, that is, the charging protocol of the charger matches the charging protocol of the mobile phone, can the "connection" be successful and fast charging be achieved.

In other words, if you want your mobile phone to charge quickly, a high-power charging head, a charging cable with high transmission current, and a matching charging protocol are all indispensable.