Kurdene SP9i-Black

The Kurdene SP9i's 60-hour total battery life is its superpower, landing in the 85th percentile. The 16.1mm drivers pump out solid bass, and the ear-hook design is comfortable for workouts. But call quality is rough at 30.1 out of 100, and build quality feels cheap. At $17 USD it's a steal for gym use, but the weak mic is a dealbreaker for call-heavy users.

The 16.1mm driver is the biggest number on the spec sheet, and it's genuinely large for earbuds. That size helps deliver the deep bass Kurdene promises, and our sound score of 67th percentile backs that up. It's not going to blow away audiophiles, but for workout playlists and podcasts, the low end has real thump. The mids and treble are fine, nothing special, but the overall sound is above average for this price bracket.

Battery is where these things shine. 12 hours on a single charge is excellent, and the 48-hour case pushes total playtime to 60 hours. That's an 85th percentile result, meaning these outlast the vast majority of earbuds we've tested. Connectivity is also decent at 66th percentile, though the listing says Bluetooth 5.3 while the spec sheet says 5.4. Either way, the 33-foot range is standard and stable enough for most situations. The mic, however, is a different story. At 40th percentile, call quality is mediocre at best, and our calls score of 30.1 makes it the weakest area by a wide margin.

Against the Anker Space A40, the Kurdene SP9i gets absolutely smoked on ANC and build quality. The Space A40 is a much more complete package, though it costs significantly more. The Soundcore P31i is a closer competitor in the budget space, and it likely offers better call quality and a more refined app experience. The JLab JBuds Pods ANC and EarFun Air Pro TW230B both bring active noise cancellation that the Kurdene simply can't match at 31st percentile. The Baseus Bass BP1 Pro is probably the most direct rival, with a similar bass-forward sound signature and budget price. The Kurdene's 85th percentile battery life is its main advantage over all of these, but the 30.1 call score is a glaring weakness none of the competitors share to the same degree.

At $17 USD, the Kurdene SP9i is almost an impulse buy. You're getting 60 hours of total battery, a comfortable ear-hook fit, and decent sound for less than a pizza delivery. That's a strong price-to-performance ratio for the battery alone. But the EUR 84 price in Spain is a different story entirely. At that price, you're competing with much better buds, and the weak mic and build quality become harder to forgive. The MXN 506 price in Mexico sits somewhere in between. If you can get these for under $20 USD, the value is hard to beat. If you're paying European prices, look elsewhere.

The Kurdene SP9i-Black (which, confusingly, also comes in Hot Pink) is all about battery life. You get 12 hours from the buds and another 48 from the case, landing it in the 85th percentile for battery in our database. That's the headline here, and it's a good one for the price. But the overall score of 46.6 out of 100 tells you the rest of the story isn't quite as rosy. These are budget ear-hook buds that nail endurance and fit, but stumble hard on calls and build quality.

With a 4.3-star average from over 6,000 reviews, people clearly like something about these. The 16.1mm dynamic drivers promise big bass, and the ear-hook design is meant for workouts and runs. But our data shows a product that's solid in the middle for sound and connectivity, while the mic performance is a real weak spot at 30.1 out of 100. If you need buds that last forever and stay put, keep reading. If you take a lot of calls, maybe don't.

Skip these if you take calls on your earbuds. The 30.1 out of 100 call score is one of the weakest we've seen, and the mic ranks at just the 40th percentile. You'll sound muffled and distant to whoever's on the other end. Also skip if build quality matters to you. At the 34th percentile, these feel cheap and plasticky, and the 100g weight is heavy for earbuds. Gamers should look elsewhere too, with a gaming score of 42.8 suggesting noticeable audio latency. And if you're paying EUR 84 in Spain, absolutely skip these. That price puts you in range of much better buds with real ANC and decent mics.

The Kurdene SP9i is a battery monster with a comfortable fit and decent bass, but it's dragged down by poor call quality and flimsy build. At $17 USD, it's a solid buy for gym rats and runners who want buds that last all week and stay put during workouts. The 60-hour total battery life is genuinely impressive, and the 4.3-star rating from over 6,000 buyers suggests most people are happy with what they got. But if you need to take calls or want something that feels premium, the 30.1 call score and 34th percentile build quality should send you elsewhere. For the right price and the right use case, these are a bargain. For everything else, they're a compromise.