As part of the Ryobi ONE+™ system of over 200 cordless tools for the home, garden, automotive, crafting and much more, the Ryobi 18V ONE+™ RB1840T 4.0ah High Energy Lithium+ Battery is perfect for DIYers who need more power and longer run-times. Ideal for DIYers and hobbyists who want to power their first Ryobi ONE+™ tool or add more batteries to their system with increased runtimes. The innovative High Energy Lithium+ Ryobi battery technology provides 3 times more runtime and 20% more power than previous Ryobi lithium technologies. The High Power battery cells generate up to 25% less heat in high demand applications which maximises runtime. A new highly efficient 4-tab design makes it easier for energy to flow, increasing power by up to 20%. Featuring IntelliCell™ technology which monitors and balances individual cells to maximise run-times, storage life and safety. Incorporating a 4-stage fuel gauge which displays the remaining power (100%, 75%, 50%, 25%). The tough pack design with built in impact protection ensures long term durability. Using a 4.0ah High Energy battery (included) with the Ryobi R18DD3, you can drive up to 500 13mm x 50mm holes on a single charge. Charger sold separately.