The fast charge wattage of 5a is 22.5w, 40w, 50w. 5a means that the charging line can only meet the maximum current of 5A, and fast charging refers to a charging method that can make the battery reach or close to a fully charged state within 1-2h.
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charge
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Refers to the process of replenishing a device, such as a battery. The principle is to let the direct current pass in the opposite direction of the discharge to restore the active substance in the battery. The process by which the battery receives electrical energy from the external circuit and converts it into the chemical energy of the battery. After the battery energy is consumed by discharge, it can be restored by charging, and it can be re-discharged to form a charge discharge cycle. Generally charged with DC current (also useful asymmetric AC current or pulse current). In different cases, different charging methods are used, such as constant current charging, constant voltage charging, floating charging, trickle charging, rapid charging or the combination of these methods.
5V5A refers to the 5V voltage and 5A current of the output end of the charger, but also refers to the minimum output parameter in the case of rated resistance of 1 ohms, so 5V5A is 25W, this is only a specific parameter; As for whether it is a real fast charge, it also depends on the charging mode of your charger integrated circuit board, whether it matches the charging mode of the mobile phone; The data cable used for charging should be a fast charging data cable!
5v x 5a = 25w, so it should be a 25w fast charge.