4000mAh V7 Replacement Battery for Dyson V7 Motorhead Product information:- Number of batteries:1 Lithium ion batteries required. included - Battery cell composition:Lithium Ion - Battery weight:420 Grams - Standard capacity :4000mAh - Nominal capacity :4000mAh - Standard voltage :21.6V - Car Boat Load voltage: 21.6v - Factory voltage: 21.6v - Rechargeable: yes Charging voltage: 21.6v Working temperature: - 20-40C Battery type: lithium battery Contents in Box:- 1 x Battery More information about product:- This battery is the replacement for Dyson cordless vacuum V7, Battery type: Lithium-ion.