Took it off the power supply at 11.00 a.m. today, and at 10.00 p.m. when the battery was at 20% it switched to economy mode.
In between I was surfing for about 4 hours. 1 hour of which was spent zooming with Bluetooth headphones.

I do ZOOM meetings with my laptop and after about 100 minutes my battery is still at about 40%.

I'm sorry that I can't give you any definitive information about this, as my notebook is permanently installed with a large screen and is always connected to the power cable as a stationary PC, but thank you for asking. Otherwise very satisfied with the device. Kind regards.

That's a good question, to tell you the truth, I've never tried it. I'll test it for you today and get back to you later.
Have a nice day!