NTT DoCoMo, Inc. announced today that the company together with Fujitsu Laboratories Ltd. has developed a new and improved prototype methanol fuel cell for 3G FOMA handsets.

The new prototype enables eight hours of continuous talk time, three times the capacity of the existing prototype, while weighing the same, 190g.
DoCoMo improved the capacity by increasing the methanol concentration from 30% to over 99% and developing a method of recycling the generated water.
More details in this press-release.

NTT DoCoMo announced its first fuel cell for mobile phones in February. Looks like the make fast progress, although the prototype fuel cell is still to big for complete integration in a mobile phone.