2 ms·
No. Batteries only last a few years before the chemistry degrades. And anyway, microwatts are useful in certain restricted circumstances, but are easy to come
by ncmncm 5y ago
No. Batteries only last a few years before the chemistry degrades.
And anyway, microwatts are useful in certain restricted circumstances, but are easy to come by. A solar cell illuminated by starlight gives you more. Needles in a lemon gives you way more more.