Ryobi ONE+ 18V 5.0 Ah Li-ion Power tool battery. The extremely powerful 5.0 Ah 18V Lithium+ Battery means that you can drive in more screws drill more holes & cut more using tools in the One+ range without recharging anywhere near as often. Its 4 Stage fuel gauge displays remaining power (100% 75% 50% 25%) so you always know how much power you have left. Intelli Cell™ technology further maximises runtimes & storage life with the pack design creating much better durability. A higher capacity makes it a better battery for longer projects & those requiring more power.