RYOBI introduces the 18V ONE+ Lithium-Ion 4,00 Ah Battery (2-Pack). These RYOBI ONE+ 18V Lithium-Ion 4,00 Ah Batteries provides up to 3X more runtime compared to our 1,50 Ah standard lithium-ion battery. It is compatible with over 260 18V ONE+ tools to power you through all types of projects. It features professional grade lithium-ion cells to provide fade free, cord-like power. It performs in extreme weather temperatures and is engineered to be impact resistant. This battery also features an integrated LED fuel gauge to check your battery charge at all times. Best of all, it's a part of the RYOBI ONE+ System of over 260 Cordless Tools that all work on the same battery platform. Backed by the RYOBI 3-Year Manufacturer's Warranty, this kit includes the batteries, a charger, and an operator's manual