Lithium-ion battery technology has made impressive gains over the years. Today’s cells are cheaper than they’ve ever been, but lithium-ion still leaves a lot to be desired in terms of energy density compared to liquid hydrocarbon fuels. Which means that putting enough of them in a car to give it an acceptable range adds a lot of mass and volume. Which is where solid-state batteries come in.
In a traditional battery, a pair of electrodes are immersed in an electrolyte solution, and it’s this liquid electrolyte that allows ions to
The drone flies throughout the home on predetermined paths and automatically responds to security alarms.
The Always Home Cam costs $250 and will be available in 2021.
Amazon is launching a new Ring security camera that’s fixed on top of a flying drone.
Called the Ring Always Home Cam, it’s an autonomous indoor security camera that can fly inside your home and record footage of multiple viewpoints. Users set a path for the device to fly throughout the home. When the device isn’t in the air, it locks into a dock that blocks the camera, in an effort to assuage privacy concerns.
Amazon unveiled the device during its virtual hardware event on Thursday alongside a slew of new products. The company announced upgraded