Widely Compatible with Dyson V8 Series: Fully compatible with Dyson V8 Absolute Vacuum,V8 Animal Vacuum,V8 Fluffy Vacuum,V8 Motorhead Vacuum,Dyson V8 Hand-held Vacuum. (Note: ONLY Fit for V8 Series,NOT fit for V6,V7,V10 and other Dyson models).Product Specification:Battery Type: Li-ion, Voltage: 21.6V, Capacity: 4500mAh.No memory effect, no pollution, and low self-discharge, can be charged or discharged as needed without loss of capacity. 100% compatible with original charger..Professional certification:CE/RoHS/FCC certified and 100% brand new. Battery uses the highest quality cells, safe with rapid-charge technology while providing overload protection, over current protection, short circuit protection, high temperature protection, to make sure you can use the vacuum cleaner safely..Charging Indicator: Steady blue means charging, light off means charging completed. Flashing yellow means error occurred. Tips: Cool down the battery before recharge it. (wait for 15-30 minutes).After-sales service：provides 1 month money return/exchanges guarantee, 1 year Warranty and 24H x 7 E-mail support.