Mobile phones lose battery power for various reasons, but there are many myths surrounding this issue. One has to do with common data features like Bluetooth and Wi-Fi Direct.
The claim that Bluetooth and Wi-Fi Direct can drain your battery is false. Makeuseof writes about it.
Bluetooth and Wi-Fi Direct provide fast transfer of large files and data between devices. It's debatable which one is better, but both features are useful and similar. However, they do not drain the phone's battery.
Why Bluetooth and Wi-Fi Direct do not drain the battery
The new generations of Bluetooth and Wi-Fi Direct consume almost no power when not in use. They begin to drain the battery only when the transfer of files or data between devices is activated. As long as they are not in use, their inclusion does not affect the noticeable discharge of the battery.