> I’m curious how long other comparable batteries would last if you were only drawing 100 microwatts from them. The article claims they have about 10 times the

> I’m curious how long other comparable batteries would last if you were only drawing 100 microwatts from them. The article claims they have about 10 times the energy density of Li-Ion batteries. So assuming their numbers are correct, maybe 5 years. Purely in terms of energy density, these are cool but they're quite a long way from "phone that never needs to be charged" territory. Maybe a phone would need to be charged every few weeks instead of every couple days...except these can't be recharged at all.