Provides up to 3X the runtime compared to 1.5 Ah battery Includes: (2) 4.0 Ah Batteries and Charger Over 260 ONE+ Tools – All Work With Any RYOBI 18V ONE+ Battery This RYOBI 18V ONE+ 4Ah Lithium-Ion Battery (2-Pack) and Charger Kit provides up to 3X more runtime compared to standard 18V lithium-ion batteries. These RYOBI 18V ONE+ 4Ah Lithium-Ion Batteries provides up to 3X more runtime compared to our 1.5Ah 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. The included charger is compatible with all RYOBI 18V ONE+ Batteries. Best of all, it's a part of the RYOBI ONE+ System of over 260 cordless tools that all work on the same battery. Backed by the RYOBI 3-Year Manufacturer's Warranty, this kit includes two 18V ONE+ 4Ah Lithium-Ion Batteries, an 18V Charger, and an operator's manual.