Compatible With All RYOBI® 40V Lithium Tools And Chargers, The 40V 4.0 Ah Lithium-Ion Battery Is The Perfect Addition To Your Ryobi® 40V Tool Collection. It'S Lithium-Ion Cells Deliver Fade-Free Performance From Start To Finish. The Convenient On-Board Battery Life Indicator Keeps You Informed While You'Re Out In The Yard Tackling Your Landscaping Jobs. The 40V 4.0 Ah Lithium-Ion Battery'S Extra Cell Capacity Is Perfect For Higher Output Tools Like 40V Mowers, Blowers And Chain Saws. Ryobi 40V Lithium Surrenders Nothing But Gas.

• 4.0 AH High Capacity: Ideal For 40V Blowers, Mowers And Chainsaws
• 2X More Runtime Than The RYOBI® 40V 2.0 Ah Compact Battery
• Fade-Free Lithium-Ion Power
• On-Board Battery Life Indicator for User Convenience
• 3-Year Limited Warranty
• Mfg #OP4040A1