No need to worry the power of your tool runs out at the half of work. 4600mAh battery Replacement for Dyson V7 Motor-head Pro, V7 Trigger, V7 Animal, V7 Car+Boat etc Compatible with Dyson v7 series vacuum v7 motorhead v7 trigger v7 animal v7 car+boat v7 absolute v7 HEPA Package Includes: 1 x battery Replacement for Dyson V7 1 x Post Filter, 1 x Pre Filter 1 x Brush 1 x Protective Shell Product Specification: Battery Type: Lithium-ion Battery Voltage : 21.6V Battery Capacity: 4600mAh Battery Condition: New Battery storage method: Keep battery away from heat and metal accessories. Give a full discharge and charge every month during storage time. Please don't stay battery on the charger unless in charging. Don't store in the damp and direct-sun exposure.