Ideal for long periods of use & larger DIY projects, this 4.0 Ah battery powers all Ryobi One+ tools & is part of Ryobi’s new 4.0 Ah Lithium Ion battery range. Running for up to 95% longer than previous ryobi batteries, the RB18L40 has Intelli Cell technology which monitors & balances individual cells to maximise run times, storage life & safety. The protection electronics & enhanced secure build ensures durability from overheating, damage & overloading.