RYOBI introduces the 18V ONE+ 8.0 Ah Lithium-Ion HIGH PERFORMANCE Battery with ONE+ 18V 4.0 Ah Lithium-Ion HIGH PERFORMANCE Battery (2-Pack). This 8Ah battery has premium 21700 cells that when combined with our INTELLICELL technology delivers up to 40% more power and up to 8X more runtime increasing overall efficiency. With this battery, you can make over 300 cross cuts per charge on 2x6 yellow pine using our ONE+ HP Brushless 7-1/4” circular saw. These RYOBI ONE+ 18V Lithium-ion HIGH PERFORMANCE 4Ah batteries provide up to 4X more runtime, 30% more power, and runs cooler compared to our standard lithium-ion batteries to provide long-lasting reliability and better performance in over 300 ONE+ Products. Best of all, they are a part of the RYOBI ONE+ System of over 300 Cordless Products 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.