Sony works on paper-powered battery

Who would have figured out that batteries will be powered by paper one day? Engineers at Sony did, where they recently paraded a bio battery that is capable of generating electricity through the clever use of paper as fuel. This is definitely an improvement over previous battery models that relied on glucose, as this particular paper-powered bio battery relies on an enzyme to decompose paper into glucose – whereby this glucose that is harvested will then be used for power generation. In order to ensure that the decomposition kicks in, Sony relied on an enzyme known as cellulase, where it will make short work of cellulose. As cellulase functions as a catalyst, it can then be reused later on if collected. Sony has also improved the overall power generation capability of this bio battery, where it works well even with the presence of impurities generated by decomposing paper apart from glucose. For comparison’s sake, it seems that decomposing a sheet of A4-sized paper will result in up to 18Wh of electricity – which is similar to the amount of juice generated by half a dozen AA batteries.

mPowerPad - all-in-one portable solar charger, radio, reading light, torch, and ultrasonic insect repellent

With recent advances in photovoltaic panels and rechargeable batteries, it's only natural that there should now be an influx of solar-powered electronic devices. Just last week we profiled the Sunbox solar power system, that uses energy from the Sun to power three kinds of lights, recharge AA batteries, and juice up mobile phones. Now, it's time to take a look at a similar product, Third Wave Power's mPowerPad. It can charge mobile devices through its two USB ports, along with serving as a radio, flashlight, reading lamp, and even an ultrasonic insect-repelling device. As you might have noted in the photo, however, it has no external controls ... so how are you supposed to use the thing?

Third Wave describes the mPowerPad as the "world's first All-in-One portable solar charger with gesture-based technology." This doesn't mean that you gesture to it, but rather gesture with it - the pad contains an accelerometer, that allows users to change settings and functions by tilting or turning the device. That feature isn't just a quirky gimmick. Combined with its water-, dust- and shock-resistant qualities, the pad's lack of the traditional protruding knobs and switches makes it a fairly rugged little unit.

One does have to wonder if unintentional switches could be activated when simply moving the device around, although presumably this has been thought of.

In order to reach its full 2500mAh battery capacity, the mPowerPad's 4-watt solar panel must bask in the Sun for a little under six hours - it can likewise be charged from mains power or a car adapter in just one hour. A full charge is said to provide up to 20 hours of 8 watt bulb-equivalent illumination, radio listening, or bug-bothering. That figures goes down to 4-5 hours if it's simultaneously charging another device. The pad can also completely recharge an iPhone, reportedly in the same amount of time it would take using a traditional AC outlet.

The mPowerPad was unveiled in Singapore this month, and should start shipping in January. It is priced at US$80.