No natteries required flashlight. Powered by shaking, useful to have in-case of a power outage or zombie apocolpyse!
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Look inside the clear case as you shake, and see the powerful magnet pass back and forth through a loop of wire. The electrical energy produced is stored in a NiMH battery that can be charged hundreds of thousands of times. The bulb is an ultra-bright white LED. 30 seconds of shaking provides a full charge, and will produce a beam of light for several minutes. Use this to wrap up and review many concepts in your unit on electricity and magnetism.