Ideal for long periods of use and larger diy projects this 40ah battery powers all ryobi one tools and is part of ryobirsquos new 40ah lithium ion battery range running for up to 95 longer than previous ryobi batteries the rb18l40 has intellicell technology which monitors and balances individual cells to maximise run times storage life and safety the protection electronics and improved secure build ensures durability from overheating damage and overloading