At the time, many competitors were still hovering around 4000mAh. The combination of the large battery and the energy-efficient Snapdragon 665 processor resulted in exceptional endurance. Most users could comfortably achieve a day and a half to two days of usage on a single charge. The device supported 10W standard charging, which, while slow by modern 60W+ standards, was standard for the tier in 2019.

The Oppo A9 comes with several notable features, including:

The Oppo A9 is a mid-range smartphone that was launched in April 2019. The device is part of Oppo's A series, which is known for offering affordable and feature-packed smartphones.

The OPPO A9 (2020 adopted a modern aesthetic that was trendy at the time. It featured a plastic body with a gradient finish on the rear, available in colors like Space Purple, Marine Green, and Vanilla Blue. While plastic is often associated with budget constraints, OPPO’s finish gave the phone a glossy, premium feel that resisted fingerprints better than many glass-backed competitors.