Home Depot is currently offering a pair of RYOBI ONE+ 18V 4Ah Batteries for $79 shipped. Typically fetching $159, you’re looking at 50% in savings alongside a new all-time low that’s $20 under our previous mention. Upgrading your RYOBI tool arsenal, these 4Ah batteries are compatible with the entire ONE+ ecosystem. Whether you’re looking to upgrade an old set of tools with some new juice or want to get in for the first time, these are hard to beat value-wise. Speaking of, this package also includes a free 18V Cordless Handheld Electrostatic Sprayer, though that’s more of a bonus than a real selling point. Home Depot customers seem to agree, with a 4.7/5 star rating from over 440 shoppers. Head below for more.