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Flashlight
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===Capacitor=== At least one manufacturer makes a rechargeable flashlight that uses a [[supercapacitor]] to store energy.<ref>Francois Beguin, Elzbieta Frackowiak (ed), ''Supercapacitors: Materials, Systems and Applications'' Wiley 2013, {{ISBN|3527646698}}, p. 515</ref> The capacitor can be recharged more rapidly than a battery and can be recharged many times without loss of capacity; however, the running time is limited by the relative bulk of capacitors compared to electrochemical batteries.
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