Enabling Airplane Mode Slightly Reduces Smartphone Charging Time

Recent tests have demonstrated that activating airplane mode during smartphone charging can lead to a modest reduction in charging time. By disabling wireless communications such as cellular, Wi-Fi, and Bluetooth, the device's power consumption decreases, allowing more energy to be directed toward charging the battery.

In a series of experiments, a Samsung Galaxy S24 Ultra was charged from 0% to 100% with and without airplane mode enabled. The results showed that with airplane mode on, the device reached full charge in approximately 1 hour and 2 minutes, compared to 1 hour and 9 minutes without it—a difference of about 7 minutes. These findings are consistent with earlier studies, including a 2014 CNET test that observed a 4-minute reduction in charging time when airplane mode was used.

However, the benefits of this method are relatively minor. While enabling airplane mode can slightly expedite charging, the time saved is generally around 5 minutes, which may not be significant for most users. Additionally, using airplane mode during charging disables incoming calls, messages, and internet connectivity, which could be inconvenient.

It's also important to note that factors such as ambient temperature can influence charging efficiency. Higher temperatures were observed to increase charging times, regardless of whether airplane mode was enabled. Therefore, while activating airplane mode can offer a slight improvement in charging speed, its practical advantages are limited, and users should weigh the minor time savings against the loss of connectivity during the charging period.