For Chuwi iLife V7 / V7s / V7s Plus / V7s Pro Kitfort KT520 Robot Vacuum Main Roller Brush For Cleaner Parts Kits Accessories|Vacuum Cleaner Parts| - AliExpress
Amazon.com: Replacement Battery Compatible with ILIFE A4s, A4s pro, A6, A7, A8, A9, V7s Plus Robotic Vacuum Cleaners, 2600mAh, 14.4v/14.8v : Home & Kitchen