CEATEC show in Tokyo, Japan, KDDI shows methanol fuel cell as an energy source mobile phone prototype. KDDI and Toshiba jointly developed, besides have a methanol fuel cell, it also includes the typical lithium-ion battery module to serve as an emergency energy use.
Generally speaking, fuel cells can provide users with 320 hours use of time than regular lithium battery life, while the methanol is easier to add energy. According to images shown, If fuel used up, the user only put fuel into the hole.
KDDI hopes to achieve in the next few years, the technology for mass production.