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batteries
Can a $2.50 gadget extend alkaline battery life by 800%?
Rob Beschizza
Gadgets
Solar-charging battery for USB devices with massive 20000mAh
Mark Frauenfelder
Gadgets
What happens when Louis Armstrong's batteries are low
Rob Beschizza
Technology
Micro-windmills could someday power your phone
David Pescovitz
Technology
Graphene supercapacitors could make batteries obsolete
Mark Frauenfelder