14.8V 2800mAh 18650 Li ion Battery Side Brush Kit For Philips Robotics FC8820/FC8810 Vacuum Cleaner Accessories Parts|Vacuum Cleaner Parts| - AliExpress
High quility 14.8V 3000/3500mAh Li ion Battery for Philips Robotics Vacuum cleaner FC8820 FC8810 Vacuum cleaner parts|Rechargeable Batteries| - AliExpress
Philips Robot Vacuum Cleaner FC8810 Charging Problem - YouTube
Amazon.com: Replacement for Bissell 1974 Battery - Fully Compatible with Bissell 1605, 4ICR19/65, Philips FC8820 - (3400mAh Li-ion) : Home & Kitchen