Networking – Does it use less power to connect to a tethered phone using USB or wifi or bluetooth


If you are tethering to the internet through your mobile and your notebook is low on power you may want that connection to use the least possible power for your notebook. A USB connection will charge your phone and drain the notebook battery. Wifi and Bluetooth also require some power.

How does energy usage for a notebook compare for the following?:

  • usb connection to a phone
  • wifi connection to a phone
  • bluetooth connection to a phone

Assume light browsing, and a low usage of bandwidth.

Best Answer

Use Bluetooth then, if your phone supports BT internet sharing.

USB is not an option, since it'll give away up to 2.5W to your phone, and SoftAP eats far more in terms of power consumption if you compare it with Bluetooth.