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 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. 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.