World's smallest fuel cell

Toshiba Fuel Cell Certified as World's Smallest

Specs:For comparison, a AAA battery measures 45 mm x 10 mm in diameter and can deliver about one amp-hour (nice reference page)

Here's the relevent comparison: 20 hours * 0.1 W = 2 Watt/hours. That puts the fuel cell mid-way between AAA and AA bateries on stored power.

I somehow doubt that this would be a great thing for devices that are used infrequently like a remote control, but why not just put on a bigger tank for when you need a few days of decent power.
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