OnePlus 9 review: specs, battery & used prices

Summary

The OnePlus 9 is the 2021 flagship that carried the Snapdragon 888 into the number series a step below the Pro, wrapped in a 6.55-inch 120 Hz OLED with a 4500 mAh battery and a 192-gram body. Our catalog scores it 71 on everyday use, 22 on gaming and 85 on compactness, with a resale axis score of 75 that reflects how actively it still trades on the used market. A 48-megapixel main camera is joined by a 50-megapixel ultrawide and records 8K30 video, and the 8/128 GB trim was tracked at about $730 new. The OnePlus 9 Pro adds the telephoto tier above it, while the OnePlus 8 is the previous-year base flagship.

Display and design

The 6.55-inch OLED refreshes at 120 Hz and scores 56 on our screen axis, with a 500-nit brightness figure aimed at indoor and shaded use rather than direct summer sun. No ingress rating is documented for this model. At 192 grams the body sits in the comfortable middle of the 2021 flagship field, wide enough for the battery but short of the heavyweights.

Performance

The Snapdragon 888 was the definitive Android flagship chip of 2021, and it earns the model a gaming axis score of 22 in our catalog alongside the everyday axis score of 71 that covers browsing, messaging and media without strain. Tracked trims run from 8 GB to 12 GB of RAM, so multitasking headroom depends on the configuration you pick on the used market.

Camera

The camera axis score of 40 is carried by a 48-megapixel main camera and that unusual 50-megapixel ultrawide, a pairing that made the freeform ultrawide the photographic highlight of the phone. Video capture reaches 8K30 on the main module. The telephoto tier of the Pro line is absent here, so zoom work relies on the main sensor rather than dedicated optics.

Battery and charging

The 4500 mAh battery scores 30 on our battery axis and recharges over wired charging rated at 65 W, which earns the charge axis score of 46. There is no documented wireless charging tier, so the wired brick stays the main refill path.

Verdict

For a used-market buyer the OnePlus 9 is the affordable door into the 2021 Snapdragon 888 generation, with the screen and charging package intact and the camera family reduced next to the Pro. Used units were tracked at about $113 with ten listings in our sample, which makes it one of the cheaper 888 flagships to buy second-hand. The trade-off is documented: no telephoto tier, no ingress rating and a brightness figure tuned for indoor life.