?Compatible With Models?: This High-Capacity Replacement Lithium Ion Battery Is Compatible With Ilife A4S Robot 2800Mah, Compatible With A4, A4S, A4S Pro, A6, A7, A9, A10, V3X, Compatible With V7, V7S, V7S Pro, V7S Plus, V7 Pro, W400, W400S, Px B020, For W450 Robot Vacuum Cleaners Series Px-B020 4Inr19/66 M26-4S1P-1. | | ?Higher Battery Capacity?: 2800Mah Replacement Batteries Are Compatible With Ilife; Upgraded Battery Voltage: 14.8V/41.44Wh, 15% Higher Than Most Batteries On The Market,Enough For Clean The Whole House | | ?Satisfactory After-Sales Service?:We Provide 12 Months For The Upgraded Battery.If You Have Any Questions About Whether This Battery Is Suitable For Your Model, You Can