Current of power adapter

1. Is the power adapter current high? The unit of battery capacity is MAH (milliampere hour), and the unit of current is a (ampere) or MA (milliampere). They are not the same physical quantity, and the battery capacity is not necessarily related to the charging current.

2. Is the power adapter current high? The current value marked on the mobile phone charger (in fact, it is more appropriate to call the power adapter) is the maximum output current, not the charging current, so it cannot be confused. The charging current of the battery is controlled by the internal charging circuit of the mobile phone and is not determined by the adapter. Therefore, the higher the rated maximum output current, the greater the power of this adapter. It can replace other low-power adapters with the same voltage. This is no problem. There is no saying that "high current adapters shorten battery life". In addition, it is stipulated in the electricity that the power supply with the same voltage can replace the power supply with the power supply with a large current, but not vice versa, because if you charge with a particularly small adapter, 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 electric equipment (or the electric equipment specifies that the input voltage is within a range, and the output voltage of the adapter is within this range)

The output current of the power adapter is the maximum current that the adapter can output. The actual output current is determined by the electrical equipment. (in short, it depends on the impedance (external resistance) of the consumer and the impedance (internal resistance) inside the power adapter i=u/ (rinternal +rinternal)).

The (maximum) output current of the power adapter actually represents its internal resistance (the larger the output current is, the smaller the internal resistance is, that is, the power consumed by the adapter itself is small, and the power available for external use is large).

Therefore, whether it can be used interchangeably depends on the nominal input current of the electrical equipment. If the nominal input current of the consumer is less than the output current of the power adapter, it can be used. Otherwise, it will not move, but will not damage the equipment.

If there is any infringement in the reprint of this article, please contact us for deletion