Cheston One 4000 mAh Battery 21V (1 Battery & Charger Not Included) | 1 Year Warranty Included High Capacity: Choose from 2.0Ah or 4.0Ah battery options, ensuring prolonged usage and fewer recharges. Smart Charging: The Cheston Battery Charger features a 2A charging current for rapid and efficient recharging Universal Compatibility: These batteries work seamlessly with all Cheston power tools, providing versatility and convenience. Sustainability: The Cheston One Battery Eco System reduces waste by offering a single battery compatible with multiple power tools, promoting environmental responsibility. It Also Comes with a 1 Year Warranty In the Box : 1 Units of 21V (4000 mAh) Battery