Even Apple's first Apple Watch got a lot of flak ... market, smartwatch makers have resorted to indirect strategies to either reduce power consumption or speed up charging, but a Samsung patent ...

So, how many arm swings would you need to charge the smartwatch? Since the battery stores 1732 Joules and you get 0.015 Joules per swing, I get 1.15 x 10 5 arm swings. Now that seems like a lot of ...