I use it for my wireless headphones. It yields convenience. For small batteries, wireless isn't much of a waste. There are other ways to be mindful for the environment. Ways which have bigger impact. Not opting for a wireless charging for environmental reasons is in this case more a matter of "feel good". I get free electricity from the sun as well, and I would save more on electricity by getting a new washing machine (current is 7 years old).
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