If you don’t use any Bluetooth peripherals then saving battery is probably the priority. Heres how to disable Bluetooth on startup.

Just edit /etc/rc.local and add this before the last line (exit 0):

# /etc/rc.local

rfkill block bluetooth

# if you have a thinkpad then you may need this line too
echo disable > /proc/acpi/ibm/bluetooth

exit 0

Related External Links:

• Ask Ubuntu - How can I deactivate bluetooth on system startup