https://www.ubergizmo.com/products/lang/ru_ru/devices/oppo-r17,oppo-a9-2020/
Oppo R17 vs. Oppo A9 2020 Specs & Speed
Oppo R17, Oppo A9 2020: specs and speed comparison
oppo r17a9 2020vsspecsspeed
https://www.techradar.com/reviews/oppo-a9-2020/2
Battery life and camera - Battery life and camera - Oppo A9 2020 review - Page 2 | TechRadar
Sep 4, 2020 - It gets an A from us
oppo a9 2020battery lifereview pagecamera