Do you think headphone jacks don't use electricity?

I have accubattery on my phone. During the past 3.5 years with it, I have charged 2 143 031 mAh. That is at 3.7V average, 7.93kWh over 3 years.

An dongle jack usually had a chip that uses ~1mW. A headphone alone still has to power the headphones, which is between 0.25mW and 1mW.

That would take 1 000 000 hours in order to have a difference between 1kWh and 0.25kWh ( approximately 0.23€ difference), that is over 114 years of straight listening. That is the same difference of running your oven for about 5 minutes, once.

That is a very weird hill to die on for the environment. That is about 0.001s of energy consumption of a billionaire.