Ryobi ZROP4026 40-Volt Lithium-ion Battery 93.6 wh Certified Refurbished This Certified Refurbished product is tested & certified by Ryobi to look and work like-new. The product includes all original accessories, and is backed by a 1 Year warranty. CHARGER NOT INCLUDED Replacement back up battery for Ryobi 40-volt lithium-ion tools Fade-free power Increased runtime