Sony's new concepts for fuel cell batteries come in some interesting flavors, like these speakers-with 70s transistor radio look-that can recharge your phone or multimedia player. Or the fuel-powered, completely-wireless, coffee maker-looking home theater speaker.
Apart from the weird look, the home theater speaker is particularly interesting as it can run for months without needing a recharge.
I'm not so sure about the indoor fuel charger, however. Would it be cheaper than just connecting your devices to your computer or power plug?