NTT DoCoMo the Japanese Telco, is developing a compact water-based fuel cell intended to provide reserve power to portable devices such as cell phones.
The device basically strips hydrogen from the supplied water, sends it to the power unit where it’s recombined with atmospheric oxygen to produce water and elctricity…about 2 watts worth. The device can recharge a typical cell phone battery in about 2 hours and lasts for 3 uses.
Technically, it’s based on the polymer-electrolyte fuels cell (PEFC) which uses a special membrane such as perfluorosulfonic acid (PFSA) …etc, etc…details here.
NTT DoCoMo and Aquafairy to Develop Micro Polymer Electrolyte Fuel Cell – DoCoMo Press Release, July 14, 2006
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