There is a certain contradiction between fast charging and power saving. Fast charge is designed to charge a device in a shorter period of time, usually providing a higher current. Although this can quickly fill the battery, the high current brings relatively large pressure to the battery, which may affect its life.
In contrast, slow charging can manage the current more carefully, reducing damage to the battery. Power saving is to extend battery life by minimizing the energy consumption of the battery. Therefore, fast charging does not necessarily save power, but it can be quickly charged in a short time. According to personal needs and use situations, it is more reasonable to choose the appropriate charging method.
No power saved.
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Charging technology and power consumption is completely unrelated, generally use increased voltage or current to achieve fast charging, power consumption depends on the use of the phone, such as open software, gps, wifi, brightness and so on
No power, fast charge just charge fast