RYOBI introduces the 18V ONE Lithium-Ion 4.0 Ah Battery (2-Pack). These RYOBI ONE 18V Lithium-Ion 4.0 Ah Batteries provides up to 3X more runtime compared to our 1.5 Ah standard lithium-ion battery. It is compatible with over 225 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 225 Cordless Tools that all work on the same battery platform. Backed by the RYOBI 3-Year Manufacturer's Warranty, these batteries include an operator's manual. Charger sold separately. Up to 3X more runtime Integrated LED fuel gauge to monitor remaining runtime Delivers fade-free power in extreme weather conditions Robust construction to protect against impact Lithium-ion chemical composition resists drainage when idle Easily snaps into place and detaches with quick-release buttons Recharge on any 18V ONE Charger Part of the RYOBI 18V ONE System of over 225 Cordless Tools 3-year manufacturer's warranty Includes: (2) PBP005 18V ONE Lithium-Ion 4.0 Ah Batteries and operator's manual Charger sold separately