The RYOBI 18V ONE+ 5.0Ah Lithium High Performance Battery Twin Pack delivers more runtime and boosts the performance of your RYOBI ONE+ tools than standard lithium batteries. The pack features two 18V ONE+ Lithium High Performance Batteries. Each Battery provides 2.5 times more runtime compared to a standard 18V ONE+ 2.0Ah Battery* — so you can enjoy more time with your tools on big DIY projects, gardening and cleaning jobs! Or get longer runtimes for your outdoor lighting, fans and speakers. Each Battery can power more than 200 products from the ONE+ range. They provide ample power for ONE+ lawn mowers, blowers, vacuum cleaners, saws, sanders and other power-hungry products. IntelliCell technology works to monitor and balance each individual cell for longer life and additional safety. Temperature control, overload and deep discharge protection further enhance safety, performance and battery life. Use the on-board fuel gauge on each battery to check how much charge is left. *Runtime based on battery testing conducted with a RYOBI 2.0Ah Battery (RB1820C).