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How to tell the charging rate of a charger

Views: 6     Author: Site Editor     Publish Time: 2022-04-18      Origin: Site

How to tell the charging rate of a charger

When charging, measure the charging current. If the actual charging current is one-tenth of the rechargeable battery capacity, it is standard charging; if the charging current is close to the rechargeable battery capacity or more extraordinary than one-tenth, it is fast charging.


Example: A rechargeable battery is marked as: 1.25V, 500mAH. When charging it with a charger, it is standard charging if the actual charging current is about 50MA.


For mobile phone chargers, a charger with a general output of 5V 2A can be regarded as a fast charge; the charging power is above 10W, such as 9V 2A, 5V 4.5A, and so on.


The difference between fast charging mobile phones: First, let’s popularize two formulas: energy W (which can be regarded as battery capacity) = power P * time T; power P = voltage U* current I. When the battery capacity is fixed, fast charging shortens the time required for charging by increasing the charging power P. There are three ways to increase the power: increasing the voltage, increasing the current, and increasing the voltage and current at the same time. These three ideas have produced three representative fast charging technologies: high-voltage fast charging represented by Qualcomm Quick Charge 3.0/2.0 and MediaTek Pump Express Plus; low-voltage fast charging represented by OPPO VOOC flash charging and USB 3.1 PD Charge. Most of the fast charging solutions of other mobile phone manufacturers come from these three or are developed based on these three.


The above is some information about calculating the operating speed of the charger. Suppose you need a quotation and sample of a mobile phone charger or mobile phone data cable. Then you may wish to contact us. We are a phone charger suppliers.


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