The 18-volt Ryobi cordless power drill is $49.97, 17% off its usual price. The set comes with a drill, a 1.5-amp-hour battery ...

Everyone needs tools, but tools can be incredibly expensive. On Prime Day, however, you can stock a basic tool set for less than $20 each.

With such a critical role in energy infrastructure, storage systems need to be extremely reliable. If they go down on a low production day, it could mean rolling blackouts for an entire region. That’s ...