Akku Dyson DC35, DC30, DC30 White (Dyson 917083-02) (14.8V, 1500mAh)
Vacuum Cleaner Battery For Dyson V11 2020 Click-in Absolute Extra + Pro Torque Drive Complete Fluffy Animal, V15 Detect Total - Digital Batteries - AliExpress
How to modify Dyson DC30 vacuum cleaner to use LiPo batteries - iFixit Repair Guide