The RYOBI 18V ONE+ 4Ah Lithium HIGH PERFORMANCE EDGE Battery brings tabless lithium cell technology to the 18V ONE+ system of products to deliver even more power, longer runtime, run cooler and longer battery life. This 4Ah battery features 21700 tabless cells that when combined with INTELLICELL battery technology delivers up to 2X more power & 4X longer runtime maximizing performance in demanding applications. The COOL-CORE PRO heat management system utilizes robust laser welded cell straps & upgraded heat sinks to reduce temperature while in use. This improved energy transfer optimizes performance, allowing the battery to run 25% cooler, live 50% longer & deliver fade-free power in any condition. Achieve up to 75% faster cuts through OSB when using the Brushless 6-1/2” Circular Saw vs a standard 4Ah battery. The robust design with durable overmold & anti-vibration technology increases protection against everyday wear & tear on and off the job site. The high visibility LED fuel gauge clearly indicates remaining runtime. Pair this Lithium HIGH PERFORMANCE EDGE Battery with any 18V ONE+ HP Brushless tool for more power, longer runtime & the best overall experience. Part of the RYOBI ONE+ System - Any 18V ONE+ Battery Works With Any 18V ONE+ Product. This 18V ONE+ 4Ah Lithium HIGH PERFORMANCE EDGE Battery is backed by the RYOBI 3-Year Manufacturer's Warranty & includes (1) PBP1104 18V ONE+ 4Ah Lithium HIGH PERFORMANCE EDGE Battery & Operator’s Manual. Charger sold separately.