Lenovo Chromebooks Chromebook Duet Gen 9 (11″ MediaTek) Review

The Lenovo Chromebook Duet Gen 9 has the best battery life we've seen (100th percentile) but mediocre overall power. At $330, it's a fantastic portable reader and student sidekick, but a poor choice for real work. Buy it for all-day use on the go, not for performance.

The Lenovo Chromebook Duet Gen 9 is a $330 tablet-first Chromebook that's built for portability. It scores a 49.9 out of 100 in our overall rating, which puts it squarely in the middle of the pack for this category. Its best scores are for reading (58.8) and student use (49.4), while productivity is its weakest area at a 34.8. That tells you exactly what this thing is: a lightweight companion for browsing and media, not a workhorse.

You get an 11-inch 1920x1200 IPS screen, 8GB of RAM, and 128GB of eMMC storage, all powered by a MediaTek chip. The standout spec is the 29Wh battery, which lands in the 100th percentile. That means it's the absolute best right now for battery life among similar devices. For connectivity, it's also a standout with WiFi 6 and Bluetooth 5.1 in the 92nd percentile.

Performance is where the Duet's identity is clear. Its MediaTek CPU and GPU scores are in the 41st and 42nd percentiles, respectively. That's squarely average, and it means you're getting enough power for Chrome OS apps, streaming, and light web work, but you'll feel the limits if you try to push it. The 8GB of RAM is a solid 72nd percentile score, which is well above average for this price and helps keep multiple tabs open smoothly. The 128GB eMMC storage is exactly middle of the pack at the 50th percentile. It's fine for Chrome OS and some local files, but you'll be relying on cloud storage pretty quickly. The real performance hero here is the battery. A 100th percentile score isn't just good, it's best-in-class. You can expect this thing to last all day and then some, which is perfect for its intended use as a take-anywhere device.

At $330, the Duet sits in a crowded space between budget tablets and entry-level laptops. Its value is entirely in its portability and battery life. You're paying for a device that lasts forever on a charge and is easy to carry, but you're accepting average-to-mediocre performance in most other areas. Compared to a similarly priced Android tablet, you get the full Chrome OS desktop browser and app ecosystem, which is a plus. But compared to a $300 traditional Chromebook, you might miss the better keyboard and often more powerful internals.

Let's look at the numbers. The Duet's main competitors are tablets like the Apple iPad Pro and Samsung Galaxy Tab S10+. Those devices will crush it in screen quality (the Duet's screen is in the 40th percentile) and likely in raw CPU performance for apps. But they cost a lot more, and their battery life isn't guaranteed to be this good. Against other Chromebooks or the Microsoft Surface Pro, the Duet's productivity score of 34.8 is a real warning. If you need to do real work, a device with a better keyboard and a stronger CPU percentile will serve you better, even if it costs a bit more. The Duet wins on battery and portability, but loses on power and screen.

Skip the Duet if your scores tell you you need power or a great screen. Its CPU and GPU are in the mediocre 41st/42nd percentiles, and its screen is underwhelming at the 40th percentile. If your workflow involves heavy web apps, photo editing, or you just love a crisp display, this device's numbers indicate it will disappoint. Also, if productivity is your main goal (scoring only 34.8), you're better off with almost any traditional laptop or even a more powerful tablet.

This is a data-backed recommendation for a very specific user. If your primary needs are reading, light web browsing, media consumption, and having a device that never dies on battery, the Duet Gen 9 is a great, affordable pick. Its 100th percentile battery and strong connectivity scores make it a reliable companion. But if you need to do more than that, like serious document editing, multitasking with heavy web apps, or enjoying a top-tier screen, the numbers say to look elsewhere. Its mediocre CPU and screen scores, along with the weak productivity rating, are clear limits.