Fade-Free Lithium-Ion Power Over 75 40V Tools – All Work With Any RYOBI 40V Battery 4X More Runtime Than The RYOBI 40V 2Ah Compact Battery The RYOBI 40V 8Ah Battery is a major addition to our RYOBI 40V collection. This 8Ah battery gets 4X more runtime than the RYOBI 40V 2Ah Compact Battery while delivering the same fade-free power and performance. This battery charges in just 80 minutes using RYOBI's 40V Rapid charger. All RYOBI 40 Volt batteries come with an on-board fuel gauge to display remaining runtime. This battery works with all RYOBI 40V tools and chargers. Backed by a 3-year warranty, there's never been a better time to consider cordless.