Ryobi batteries cool in about 15–20 minutes once removed from the tool. Overheating signs include heat to the touch and ...

The Tek4 brand of 4-volt gadgets was a bold experiment for Ryobi, but it didn't last. Here's why the lineup faded and what replaced it in the years since.

Ryobi, just like any other retailer, discontinues products over time. If you're willing to do some digging, you might be able to find older products online.