Up to 3X More Runtime High Visibility LED fuel gauge clearly indicates remaining runtime Over 260 ONE+ Tools – All Work With Any RYOBI 18V ONE+ Battery Enter the RYOBI 18V ONE+ System with the 18V ONE+ 4Ah Lithium-ion Battery. With up to 3X more runtime than the previous model, this lithium-ion battery provides an improved user experience. The new compact design is lighter weight and reduces overall user fatigue. This battery features a high visibility LED fuel gauge to clearly indicate remaining runtime. Fade-free power allows users to optimize the entire charge of the battery in all weather conditions. The robust design and anti-vibration technology increases durability and enhances user experience. Easily install and remove the battery with secure quick-release latches. Best of all, they are a part of the RYOBI 18V ONE+ System of over 260 Cordless Tools that all work on the same battery platform. This 18V ONE+ 4Ah Lithium-ion Battery is backed by the RYOBI 3-Year Manufacturer's Warranty and includes (1) PBP005 18V ONE+ 4Ah Lithium-ion Battery and Operator's Manual. Charger sold separately.