Www.batteryfast.co.uk - Prolong battery life is a walk in the park | Battery Technology

batteryfast.co.uk
August 25, 2011
Prolong battery life is a walk in the park |
Battery Technology
Prolong battery life is a walk in the park
in a shoe could produce between 1 and 10 watts,
| Battery Technology
depending the speed of the walker and the efficiency
of the device.
University of Wisconsin researchers have come up
with a way of converting human motion into energy
to power a smartphone. But they say a commercial
model is years away.
While the principle of using kinetic energy from a
person walking to power a device has been explored
in the past, Tom Krupenkin and Ashley Taylor have
a slightly new twist on the technique.
In raw terms, that's very inefficient: some estimates
say a person running can produce up to a kilowatt
Their inspiration came from electrowetting, the
of power, usually lost as heat. But compared with
way that a surface that doesn't absorb liquid (thus
existing devices that convert mechanical energy to
causing droplets to form) reacts in a different way
electrical energy, it's a huge improvement.
when electrically charged (thus changing the shape
The BBC notes that one set-up, which uses under-
of the droplets.)
floor mats to power automatic doors in two Tokyo
railway stations, relies on the fact that thousands
Krupenking and Taylor's concept simply reverses
of commuters will pass over the mats.
print
joli this process, such that the movements of the droplets
caused by motion can be converted into electrical
While the most obvious use of the reverse-elec-
current. Using a form of Gallinstan, a liquid metal
trowetting device would be to use shoe movements
alloy used in thermometers, they believe a device
to power a portable device such as a phone, there
t
ed with
Prin
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batteryfast.co.uk
August 25, 2011
Prolong battery life is a walk in the park | Battery Technology
is the obvious barrier of how to physically trans-
Battery Technology | Laptop Battery Life
fer the power from shoe to gadget. There has been
suggestions of using a USB cable in some circums-
100+ Online Resources That Are Transforming Edu-
tances, such as military use where the style issues
cation by batteryfast.co.uk
of clipping a phone to an ankle holster wouldn't be
a problem. However, for consumer use the most
6 Excelent Products that Could Come from the
likely compromise seems to be that the shoe de-
Google-Motorola Deal
vice would also make the connection to the phone
network, which is one of the most power-intensive
NFC: Quick Guide to the Future of Mobile by bat-
parts of the phone. A short-range Bluetooth of Wi-Fi
teryfast.co.uk
connection could then transfer data.
How Today's Students Use Technology
The pair have now formed their own company, Ins-
tep Nanopower, and are seeking investors to help
To read more good posts, please follow us on Twit-
turn the concept into reality.
ter: http://twitter.com/batteryfastuk
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ed with
Prin
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