| The reason I mentioned the phones was the secondary Li-polymer battery. The battery is there to even out the load when the device connected consumes more power than the fuel cell can provide, which is typical of a mobile phone's pulsed transmissions.
How much power the device can actually produce continuously is unknown. The 'peak power' appears to be 3W, which is what the Li-polymer battery can manage . What the average power production is, who knows?
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