Compact and Lightweight Design 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+ 1.5Ah Lithium-ion Battery. 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.