Source: NBC News
quote: A button cell is hardly niche, there's billions of them made each year. They're just tailored to a different market, low self discharge and high capacity in a small size without a need for much current draw.
quote: 1C isn't some magic number, it's just that rather than choose to list energy storage in joules or some other unit, they settled on Ah. That many batteries can be charged in an hour or less doesn't grant some special physical significance to 1C.