Is it good to have a high power adapter current? The unit of battery capacity is mAh (mAh), the unit of current is A (amp) or mA (milliamp), the two are not the same physical quantity, and battery capacity and charging current are not necessarily related.
The current value marked on the phone charger (actually called the power adapter is more appropriate) is the maximum output current, not the charging current, and should not be confused with it. The charging current of the battery is controlled by the phone's internal charging circuit, and is not determined by the adapter.
Therefore, the higher the rated maximum output current, the higher the power of the adapter, which can replace other low-power adapters with the same voltage, which is not any problem, and there is no "high-current adapter to shorten the battery life" statement. And, there are provisions in electrical science, the same voltage power supply, high current can replace the small current, and vice versa, because if you use a particularly small adapter charging, the adapter may be in an overload state, which will burn the adapter.
What does the output current of the power adapter mean? The output voltage of the power adapter needs to be equal to the input voltage of the power device (or the clear input voltage of the power device is within a range, and the output voltage of the adapter is within that range) The output current of the power adapter is the maximum current that the adapter can output, and the actual output current is determined by the power device. (Simply put, it depends on the impedance of the power-using device (external resistance) as well as the internal impedance of the power adapter (internal resistance) I=U/(R internal + R external)).
The (maximum) output current of the power adapter actually characterizes its internal resistance (the higher the output current, the smaller the internal resistance, which means that the adapter itself consumes less power and can be used for external power). Therefore, the key to exchange use depends on the nominal input current of the power device. If the nominal input current of the device is less than the output current of the power adapter, then it can be used. Otherwise, it can't be carried, but it won't damage the equipment.
For more information about power adapter, please pay attention to BON.
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