Powering down a mobile device during charging generally results in a faster charging rate. This is because when a phone is turned off, it is not consuming any power to run background processes, maintain network connections, or keep the screen active. Therefore, all the energy supplied by the charger is directed solely towards replenishing the battery.
Optimizing charging speed is beneficial as it reduces the overall time required to restore a device’s battery to full capacity. Historically, charging times were significantly longer, making efficient charging strategies a necessity. The development of fast charging technologies has mitigated this issue to some extent, but reducing power consumption during the charging process remains a relevant method for maximizing efficiency, especially with older devices or when a high-powered charger is unavailable.