Wireless ear buds come to mind. Plus the charging case, that could be three separate batteries per headset audio device. I don’t like the idea of wireless earbuds personally, but they are admittedly prevalent in the consumer market. The thumbnail should have depicted those.
weird choice of picture, as it’s clearly one battery for headsets like those why would you need to charge both sides?
Wireless ear buds come to mind. Plus the charging case, that could be three separate batteries per headset audio device. I don’t like the idea of wireless earbuds personally, but they are admittedly prevalent in the consumer market. The thumbnail should have depicted those.