Vacuum Cleaner Replacement Rechargeable Battery For Dyson V7 21.6V 4.0Ah Li-lon Replacement and compatible battery models Compatible Models: V7 FLUFFY , V7 Extra , V7 Mattress , V7 Trigger V7, V7 Motorhead Pro, V7 Animal,V7 Car+Boat Product attribute: 1.Intelligent program protection prevents from over charge 2.High quality replacement battery 3.Compatibility with the original 4.Lower Price than Original OEM Battery 5.No memory effect. 6.Voltage:21.6v 7.Capacity:4000mAh 8.Battery Type:Li-Ion Battery Advantages: 1.BEST PERFORMANCE and PERFECT COMPATIBILITY: Fully compatible with the original charger and vacuum cleaner.It's easy to install . 2.TRUSTWORTHY RELIABILITY: No memory effect,Low rate of self-discharge (1% per month) .Patented battery balancing technology, Built-in over protection circuits provide safety and reliability from fire and explosion. 3.GREAT SAFETY: Quality Li-ion battery cells with CE and UL approval.It imports from Japan,quality guaranteed. 4.Advanced Li-Ion technology provides improved energy density. 5.STRONG WARRANTY: 7 days money back,1 year limited seller's guarantee against manufacturer defects from purchase date. Warm Notes: 1.Please fully charged battery before first use. 2.If you are not going to use the battery for a month or longer, store it in a clean, dry, cool place away from fire and water. 3.Please recharge it after long storage . As Ni-Cd/Ni-MH and Li-ion batteries will self-discharge during storage. 4.Do not Separation, extrusion, and impact. 5.If the item is defective, please notify us within 7 days after receiving it. 6.Normally, We will send the items within 2-3 business days once your payment is completed. Usually, after we dispatch, the express system takes 7-10 working days to updating tracking No. to the system. A mostly, the parcel can be delivered in 6 weeks. If you do not received your parcel in time, please kindly advise us, we will track the parcel. Note:Please use max gear for more than one minute.