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Bluetooth Battery Usage: Does keeping Bluetooth on drain the battery quickly? Tests revealed that keeping Bluetooth on all day reduced the battery level by only 1-2%, whereas the screen and GPS have a much greater impact.

Bluetooth Battery Usage: Many people believe that keeping Bluetooth on constantly drains the phone's battery quickly, so they turn it off after every use. However, the reality is somewhat different. Extensive testing showed that keeping Bluetooth on all day had no significant impact on the battery. The tests revealed that the battery level dropped by only about 1-2% over the course of the day. This proves that having Bluetooth on has a negligible effect on battery life.

How does Bluetooth Low Energy save battery?

The reason lies in modern Bluetooth technology, known as Bluetooth Low Energy (BLE). This technology transmits data in small packets while consuming very little power, thereby preserving the battery life of both the phone and the connected device. This means that when Bluetooth is simply turned on but not actively connected to a device, it consumes almost no battery power. Battery consumption occurs primarily when Bluetooth is actively connected to and communicating with a device.

What actually causes battery drain?

One might wonder why the battery drains even when the phone isn't being used. The culprit isn't Bluetooth being on, but rather the screen and location services remaining active. Tests indicate that keeping the screen on continuously consumes about 40% to 50% of the battery, while GPS usage drains approximately 10% to 20% per hour. Therefore, if your phone is running out of power quickly, you should first check your screen brightness and location settings.

This certainly doesn't mean you should never turn off Bluetooth. If you are not connected to any device and do not use it for a long period, the impact on the battery is negligible.