I have blogged about ceramic fuel cells before - Bloom Energy's products use ceramic fuel cells. Recall these fuel cells don't use the exotic hydrogen, oxygen, and platinum of NASA's manned space flight fuel cells. Likewise, this spinoff of a fuel cell developed at Berkely Laboratory is recharged by sitting it in a charcoal or biomass fire and then can be used to recharge a cell phone.
Berkely's Lab Startup Brings Fuel Cells to the Developing World explains the original design used expensive ceramics, but this new commerical design uses stainless steel to replace 90 percent of the ceramics. It is also tolerant of contaminants that would wreck conventional fuel cells. The fuel cell itself will sell for $7, while the charging and control units is anticipated to sell for $17.