5A fast charge may be 4.5v, calculated by the formula that is 22.5w, of course, it may be 8v, calculated by the formula is 40w, and may be 10v, calculated by the formula is 50w, when the unit is unified, it can be clearly seen that 5A appears 22.5w, 40w, and 50w. So it's impossible to compare them. The 5a May charge faster than the 40w, slower than it, or just as fast.
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A Charger is a device that charges other electrical appliances.
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The equipment adopts high-frequency power supply technology, the use of intelligent dynamic adjustment charging technology, the use of power electronic semiconductor devices, the voltage and frequency fixed alternating current into direct current, generally composed of flexible circuit boards, electronic components, etc., according to the design of the circuit working frequency can be divided into power frequency machine and high frequency machine, in various areas are widely used, especially in the field of life, It is widely used in common electrical appliances such as mobile phones and cameras.