Technical FAQs 4

Who makes portable power units?

Japanese and Korean companies are the most involved in portable power units for electronic devices, and have recently launched a series of products that are mainly based on direct methanol-fuelled PEFC; large-scale commercialization of these devices is planned in the coming years.

Can a supercapacitor be used as a rechargeable power source?

For moderate energy demands in portable electronics, supercapacitors are suitable as rechargeable stand-alone power sources. In conjunction with rechargeable batteries in uninterruptible power supplies, supercapacitors can handle short interruptions and can extend battery life.

Can methanol fuel cells be used as a power supply?

Mainly fuel cells operating on methanol are currently tested for the purpose of man- portable power supply by the different armies. The French and US armies, however, are also considering hydrogen-fed proton-exchange membrane fuel cell (PEMFC) systems.

How much electricity does a laptop use?

This distinction is useful because smaller personal devices – such as cameras and mobile phones – tend to draw about 3 W, while laptops and other large electronics devices can use up to 50 W. Other criteria are also available in the literature.

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What is the role of portable power supply

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