In a world where thinner often means weaker batteries, TECNO is flipping the script. The company is set to unveil the TECNO SPARK Slim at MWC 2025, and it’s making headlines for good reason—this is the world’s slimmest smartphone at just 5.75mm, yet it somehow crams in a massive 5200mAh battery. TECNO’s latest concept phone isn’t just about aesthetics; it’s about proving that ultra-thin doesn’t have to mean underpowered.
In This Article
A Record-Breaking Slim Profile Without Battery Anxiety
Smartphone brands love a thin-and-light device, but that usually comes at the cost of battery life. TECNO, however, has managed to shrink the SPARK Slim down to 5.75mm while keeping a battery that actually lasts. This is no small feat—most ultra-thin phones struggle to make it through the day without a charger in sight.
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The phone’s 6.78-inch 3D Curved AMOLED display packs a sharp 1.5K resolution (1224P) and a buttery smooth 144Hz refresh rate. And for those who hate squinting at their screens in bright sunlight, the 4500-nit peak brightness ensures clear visibility anywhere.
But TECNO isn’t just showing off thinness—it’s also embracing sustainability. The SPARK Slim is crafted from fully recycled aluminium and features a stainless steel unibody, giving it a premium, futuristic feel without excess weight.
Big Power, Small Package
A 5200mAh battery in a 5.75mm-thin frame sounds like a contradiction, but TECNO’s high-density battery technology makes it possible. And thanks to 45W fast charging, the SPARK Slim isn’t just long-lasting—it’s quick to refuel too.
Under the hood, TECNO is packing an octa-core processor, though the company hasn’t yet revealed which chip will power the device. Expect a smooth performance for daily tasks, gaming, and multitasking.
On the camera front, a 50MP+50MP dual rear setup is paired with an interactive light band that adds a unique, futuristic aesthetic to the design. Meanwhile, the 13MP front camera ensures crisp selfies and high-quality video calls.
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A Glimpse Into the Future of Ultra-Thin Smartphones
TECNO is using the SPARK Slim to make a statement—ultra-thin phones don’t have to be weak. By combining a powerful battery, cutting-edge display, and a sleek, sustainable design, the brand is redefining expectations.
The TECNO SPARK Slim will make its debut at MWC 2025 in Barcelona, at TECNO’s booth 6B11, Hall 6, Fira Gran Via. Attendees will get a firsthand look at how far smartphone design has come—and where it’s headed next.
The Tecno SPARK Slim is an interesting proposition in a market where slim phones often sacrifice battery and performance. If TECNO delivers on its promises, this could be a game-changer for those who want sleekness without compromise. The real question: Will other brands follow suit, or will TECNO dominate the ultra-thin smartphone niche?
