@linux_mclinuxface @jefftml rechargable AAA maybe ? Or 18650s ?

@linux_mclinuxface @jefftml I wouldn't worry too much about your components shorting enough to explode through a plastic box on low voltage battery.

@linux_mclinuxface No idea what you're trying to build and why it goes under your pillow, but what failure modes are you expecting?

That it broke and doesn't update a sensor somewhere anymore? Who cares.

That it explodes under your head? Not much more likely than a commercial product, if you know what you are doing.