I was just thinking if you are on your computer anyway would it just use some of the excess electricity that your computer would have wasted or would it be worse than charging your phone from a charger while using your laptop separately.
I was just thinking if you are on your computer anyway would it just use some of the excess electricity that your computer would have wasted or would it be worse than charging your phone from a charger while using your laptop separately.
The amount of heat this will add to your case is negligible. We’re talking 15% waste on a 20W load, so 3W worth of extra heat. And that heat is produced in the PSU.
(PSU efficiency standards: https://i.imgur.com/WSWrsCm.gif)
If the heat is negligible I would assume it should not matter as long as you do not charge while your pc is doing a task that uses up to much resources?