RYOBI’s 36V 4.0Ah Battery is the perfect ‘in-between’ battery that has enough runtime capacity to mow a medium-sized lawn while also being lightweight enough to use with a Leaf Blower or Line Trimmer. The on-board LED fuel-gauge helps to remove the guesswork when out in the garden by showing how much charge is left in the battery. It’s a great addition to your 36V collection.