Stop swapping weak packs mid-task. Our 6.0 Ah Ryobi 40 V replacement battery delivers 150 % more runtime than the standard 2.5 Ah OP4015 while weighing less than most 5.0 Ah packs. Premium Samsung-grade 18650 cells guarantee fade-free power for high-draw tools like the Ryobi 40 V brushless mower and snow blower. An integrated microchip prevents over-charge, over-heat and self-discharge, so you can store the battery for months without losing a single volt. From dawn-to-dusk yard work to remote camping sites, this one battery keeps every Ryobi 40 V tool in your arsenal running stronger, longer.