No way this made it out of internal vetting without a recharchable battery.
Man, if I even suggested this over lunch with my old Sparkfun colleagues, I would have been shot down before I finished chewing my bite of open-faced turkey sandwich.
Instead of casually dismissing the idea, perhaps they considered it and found recharging had its own engineering costs, namely the potential for a swelling battery on your finger, a long life which means you probably would lose a custom charger, and the increased size for the extra requirements.
Man, if I even suggested this over lunch with my old Sparkfun colleagues, I would have been shot down before I finished chewing my bite of open-faced turkey sandwich.