But have you used Ryobi's battery-operated grease gun? Home Depot also features other selections of battery-operated grease guns, including the Milwaukee M18 18V cordless gun at $229. The battery ...

They can be powered by a car battery, 12V car adapter, or any of Ryobi's 18V One+ batteries, with the 12 Ah battery giving you a lot more capacity and runtime than smaller options. The 18V One+ ...

For example, if you wanted to connect a Makita battery to a Ryobi tool, you would specifically need a Makita-to-Ryobi adapter, which won't work with any other brand combination. If you wanted to ...