Fuel cell phones.
Ashley
S
S
D011211:Electric Power Supplies / Q000191:economics; D004573:Electrolytes; D006859:Hydrogen; D008832:Microchemistry / Q000191:economics / Q000295:instrumentation*; D010100:Oxygen; D014867:Water
D004573:Electrolytes; D014867:Water; D006859:Hydrogen; D010100:Oxygen