Flylinktech 21.6V 3000mAh 64.8Wh Li-ion Replacement Battery For Dyson V8 Handheld Vacuum Cleaner Voltage: 21.6V . Capacity: 3000mAh .Type:Li-ion. Compatible With :For Dyson V8 Series. Please don't use the vacuum cleaner when charging the battery.Keep the battery Clean before charge.Store it in a clean, dry, cool place away from heat and metal objects. Don't leave the battery dormant for long periods of time,We recommend using the battery at least once every two or three weeks.No memory effect! 30 days money back,6 months limited warranty.Any problems,please contact us first!