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News -09-10-05 Energy from Backpack to Replace Batteries (ScienceDaily.com) "If you already have a little spring in your step, a team of biologists at the University of Pennsylvania would like to put it to good use by adding a few more springs in the form of a power-generating backpack. Details of their prototype "Suspended-load Backpack" were announced today in the journal Science. The device converts mechanical energy from walking into electricity up to 7.4 Watts more than enough energy to power a number of portable electronic devices at once." 9-05 Papers Batteries by Type (ApexBattery.com) Provides lithium and other types of batteries. 04-08 Rechargeable Lithium Ion (Li-Ion) Batteries (All-Battery.com) Provides 123A 3v. and other batteries. 11-07 Purchase Resources Batteries - Rechargeable NiMH and Lithium Ion (SunnBattery.com) Provides batteries and chargers at a discount over retail. Minimum shipping cost is $5.50, however. Awesome Library does not endorse this product, but provides it as an example. 6-03 Flashlight Without Batteries (RealGoods.com) Light is generated by squeezing the flashlight. Awesome Library does not endorse this product, but provides it as an example. 12-02 Flashlight Without Batteries (TechnoScout.com) Manufacturer claims that the flashlight provides several minutes of light from 15 seconds of shaking it. Awesome Library does not endorse this product, but provides it as an example. 12-02 Flashlight and Radio Without Batteries (RealGoods.com) Electricity is generated by a hand crank, batteries, a solar panel, or batteries. Includes a siren and flashing signal. Awesome Library does not endorse this product, but provides it as an example. 12-02 Rechargeable 123A Lithium Ion Batteries and Chargers (All-Battery.com) Provides batteries and chargers at a discount over retail. Awesome Library does not endorse this product, but provides it as an example. 05-07 Rechargeable 123A Lithium Ion Batteries and Chargers (BatteryJunction.com) Provides batteries and chargers at a discount over retail. Awesome Library does not endorse this product, but provides it as an example. 05-07 Research Researchers Invent a 50-Year Microscopic Battery (Context Weblog) "The prototype is the first MEMS (micro-electromechanical systems) version of a larger device." "The device converts the energy stored in the radioactive material directly into motion. It could directly move the parts of a tiny machine or could generate electricity in a form more useful for many circuits than has been possible with earlier devices." 6-03 Researchers Invent a 50-Year Microscopic Battery (Cornell) "The prototype [battery] is made up of a copper strip 1 millimeter wide, 2 centimeters long and 60 micrometers (millionths of a meter) thick that is cantilevered above a thin film of radioactive nickel-63, which emits beta particles (electrons)." "The emitted electrons collect on the copper strip, building a negative charge, while the isotope film, losing electrons, becomes positively charged. The attraction between positive and negative bends the rod down. When the rod gets close enough to the isotope, a current flows, equalizing the charge. The rod springs up, and the process repeats." 6-03

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