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Most Cordless Vacuums Claim 60+ Minutes of Battery, but Only a Few Live Up to That Promise

Forget what you think you know. Our lab tests reveal surprising links between battery life, price, suction and weight.
Interesting Engineering on MSN

US researchers retrofit streetlights into EV chargers in cost-effective citywide test

Addressing this barrier, a Penn State research team has developed a scalable framework to transform ordinary streetlights ...