Toshiba's direct methanol fuel cell (DMFC) first hit our radars when the prototype was released in 2003. This week, the company finally began shipping the Dynario - its first commercial fuel cell charger. So we've taken a look at the charger and its uses.
For now the Dynario is being offered in a limited batch of 3,000 and only via Toshiba's Japanese online store. Overseas sales are being considered but no plans have been announced.
The Dynario is probably most useful for frequent travellers or heavy users of mobile phones as a convenient way to charge while on the move but if that travel involves aircraft it becomes less useful.
With its 14ml reservoir fully loaded, it can be taken in an aircraft cabin but not put in the baggage hold. Refill cartridges, though, cannot be taken on aircraft at all.
Nevertheless, the Dynario could also find use in areas where the electricity supply is bad or as a device for use after natural disasters when power might be out.
The charger costs ¥29,800 (£199) and a pack of five cartridges costs ¥3,150 (£21).
It will be interesting to see where the technology goes. Already Toshiba has been demonstrating for more than a year a prototype mobile phone with embedded fuel cell charger.
Most recently it was shown at the Ceatec exhibition this month with carrier KDDI although the mobile phone company has yet to announce any launch plans.