Congrats on the launch. This is really interesting to me, not because I need it, but because I don't, and it would never have occurred to me that anyone else might. Personally I don't think I've ever, in my entire technology-using life, had a device run out of battery or even drop below around 40% [1].

So it's always a good reminder to pay attention not ONLY to building products that solve your own needs, but also finding what needs other people might have that you'd never even considered!

[1] with the notable exception of some awful NiCd-powered VHS camcorders in the 80s