RYOBI introduces the 18V ONE+ 4Ah Lithium-ion Starter Kit. This RYOBI 18V ONE+ 4Ah Lithium-ion Starter Kit provides up to 3X more runtime compared to standard 18V lithium batteries. These batteries are compatible with over 280 18V ONE+ Products to power through all types of projects. Built with professional grade lithium cells these batteries provide fade free, cord-like power. They are engineered to perform in extreme weather temperatures and are engineered to be impact resistant. They also feature an integrated LED fuel gauge for charge monitoring. The included charger is compatible with all RYOBI 18V ONE+ Lithium Batteries. Backed by the RYOBI 3-Year Manufacturer’s Warranty, this kit includes two 18V ONE+ 4Ah Lithium Batteries, an 18V ONE+ Charger, and an operator’s manual.