Interestingly enough, though the idea of this Action is to design, many alternatives have already been designed. For example, I already use a watch that isn't powered by a battery, and it used to be owned by my grandfather and then my father! It is a Rolex that uses kinetic energy to keep the movement of the watch. As I swing my arm through the day, it keeps time without needing winding.
If I were to design a way to power something I use every day, I'd want to use similar kinetic charging to assist my cell phone. I carry it throughout the day just as much as my watch. Certainly, the phone would have to be much heavier than it is now, and potentially larger, but I haven't been concerned about the size of cell phones since the 1980's.
But with alternative technologies already in place, I can take Action just by being more mindful. Today, I'm placing flashlights that are powered by solar energy and kinetic energy (cranking and squeezing) that I already own in priority positions and making a note to use them instead of the ones that use disposable batteries. A friend of mine told me that there were solar cell phone chargers at REI, and I've found some reasonably priced solar chargers for cell phones and laptops for sale on Amazon that I can easily purchase instead of replacing an old style charger.