Fuel cell lantern ditches batteries for salt water
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Ben Coxworth
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February 1, 201
One of the PL-500's fuel cell anodes is claimed to last as
long as 85 AA batteries (Credit: Hydra-Light)
For many people, camping/emergency lanterns are one of those
things that may sit for months without being used, only to have dead
batteries when they're finally needed again. While
solar-powered lanterns are one alternative, they do still need
to sit in the sunlight for a few hours in order to charge. That's
where Hydra-Light's PL-500 comes in. It's a fuel cell-powered
lantern that's ready to shine as soon as it receives some salt
water.
The PL(Personal Lantern)-500 features 16 LEDs, along with a USB
outlet for charging devices such as smartphones. It also comes with a
palm-sized 3-LED Accessory Light, which can be plugged into and powered
by a 2.5-mm outlet on the main lantern, via a 30-ft (9-m) power cord.
At the core of the lantern's EC-250 EngergyCell is a carbon film
cathode, and a high energy-density alloy anode called the PowerRod. When
exposed to salt water, that PowerRod starts to oxidize, releasing an
electrical current as it does so.
According to the designers, one "inexpensive" rod can power the
lantern for over 250 hours before shrinking to the point that it needs
to be replaced. When it does need replacing, the process reportedly
takes just a few seconds.
The salt water can take the form of tap water mixed with ordinary
table salt, or it can even be straight seawater. Needless to say, the
fuel cell should be rinsed off and stored dry when the lantern isn't in
use. It is claimed to have a shelf life of at least 25 years.
Hydra-Light plans to launch a Kickstarter campaign in the middle of
this month, in order to finance production of the PL-500. A pledge of
US$48 will get you one, when and if they're ready to go.
Source:
Hydra-Light
http://www.gizmag.com/hydra-light-fuel-cell-lantern/41608/
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