vhbw Li-Ion Battery 4500 mAh for Vacuum Cleaner Samsung Navibot SR8845 SR8844, SR8846, SR8847 SR8855/SR8848/SR8849, SR8850, such as VCA VCA-RBT20.: Amazon.de: Home & Kitchen
Battery For Robot Vacuum Cleaner Samsung Navibot Sr8750, Sr8845, Vcr8855 Series (14.4v, 3000mah, Ni-mh). Pn: Vca-rbt20, Ap5576883 - Vacuum Cleaner Parts & Accessories - AliExpress
How to replace battery on Samsung NaviBot vacuum cleaner - YouTube