RYOBI 18V ONE+ Lithium+ 4.0Ah Battery \u2013 Twin Pack for longer runtime and better performance\nThe RB1840X is a powerful 4.0Ah Lithium+ battery designed for use with all RYOBI 18V ONE+\u2122 tools. Offering more runtime, longer life, and enhanced durability compared to previous-generation batteries, it\u2019s the smart choice for users who want extended performance in a compact form.Smarter cells, tougher design\nIntelliCell\u2122 technology monitors and balances each individual cell, maximising power output and ensuring longer lifespan and safety. A 4-stage fuel gauge on the battery shows remaining charge at a glance\u2014100%, 75%, 50%, or 25%. The tough housing is impact-resistant and built to handle demanding jobsites.\nCompatible with over 200 tools in the RYOBI 18V ONE+ system, this battery can drive up to 1,240 4\u00D732 mm screws with the R18DD3 or cut up to 88 metres of 13 mm plywood with the R18CS:contentReference[oaicite:0]{index=0}.Specifications:\n--Voltage: 18V\s