AKKU 31136: Battery for ILIFE V7, Li-Ion, 2600 mAh at reichelt elektronik
Amazon.com: Replacement Battery for ILIFE V3s Pro V5s Pro V50 V8s X750, fits Part Number 18650B4-4S1P-AGX-2,14.4V Li-ion 2600mAh/37.44Wh : Industrial & Scientific
Amazon.com: ANHO SAFE AND GOOD Replacement Battery Compatible with ILIFE A4s, A4s pro, A6, A7, A8, A9 Robotic Vacuum Cleaners, 2600mAh, 14.4v/14.8v : Home & Kitchen
NEW 14.8V 3500mAh 14.4V 3200mAh Lithium Battery For ILIFE A4 A4s V7 A6 V7s Plus Robot Vacuum Cleaner ILife 4S1P real Capacity - AliExpress