If you have a large yard or need extra run time, the RYOBI 40V 7.5 Ah High Capacity Battery is the perfect addition to your RYOBI 40V collection. This 7.5 Ah battery gets 4X more runtime than the RYOBI 40-Volt 2.0 Ah Compact Battery while delivering the same fade-free power and performance. This battery works with select tools in the RYOBI 40V collection, refer to the compatibility page for more information.