Replacement Lithium-ion 21.6V Battery Power Tool Rechargeable Battery for Dyon V11 Handheld Cordless Vacuum Cleaner. Real machine test, perfect replacement of the original battery, the battery is universally compatible with the original charger, no need to replace the charger. Nvironmental and Low pollution;Long service life. Intelligent control, multiple protection, safer and more efficient charging. The battery capacity allows the vacuum cleaner to be used for a long time.