How I check, test, and charge my AA and AAA batteries - and sift out defective ones

I've been a fan of Olight flashlights for many years. Now I'm a fan of its new pro-grade battery charger. Here's why.

Roborock reigns supreme for robot vacuums—but these other editor-tested models are worth a look

We put several robot vacuums from Roborock, Eufy, Dreame, and more through a series of mess tests to see which stood out.
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Forecasters flag signs El Niño could return, with "super" scenario possible

Federal forecasters at NOAA’s Climate Prediction Center say there is a 61% chance that El Niño, the periodic warming of equatorial Pacific waters that reshapes weather worldwide, will emerge between ...