1.Is the current of the power adapter good? The unit of battery capacity is mAh (milliampere hour), and the unit of current is A (ampere) or mA (milliampere hour). The two are not the same physical quantity, and battery capacity is not necessarily related to charging curren

2. Is the current of the power adapter good? The current value marked on the mobile phone charger (actually called a power adapter is more suitable) is the maximum output current, not the charging current, and cannot be confused. The charging current of the battery is controlled by the internal charging circuit of the phone, not determined by the adapter. Therefore, the larger the rated maximum output current, the greater the power of this adapter, and it can be replaced with other low-power adapters of the same voltage without any problem. There is no such thing as "high current adapters shorten battery life". Moreover, there are regulations in electricity that for power sources with the same voltage, a high current can replace a low current, but the reverse is not possible because if you charge with a particularly small adapter, the adapter may be overloaded and burn out.

What does the output current of a power adapter mean? The output voltage of the power adapter needs to be equal to the input voltage of the electrical device (or the electrical device specifies that the input voltage is within a range and the adapter output voltage is within that range)

The output current of a power adapter is the maximum current that the adapter can output, and the actual output current is determined by the electrical device. Simply put, it depends on the impedance (external resistance) of the electrical device and the impedance (internal resistance) inside the power adapter. I=U/(R inside+R outside).

The (maximum) output current of a power adapter actually represents its internal resistance (the larger the output current, the smaller the internal resistance, which means that the adapter itself consumes less power and can be used for external power).

So, the key to exchanging usage depends on the nominal input current of the electrical equipment. If the nominal input current of the electrical equipment is less than the output current of the power adapter, it can be used. Otherwise, it cannot be moved, but it will not damage the equipment.