TECNO to Showcase SPARK Slim at MWC 2025: The World’s Slimmest Smartphone with a 5200mAh Battery

TECNO is preparing to unveil the SPARK Slim at MWC 2025, introducing a smartphone that challenges the usual trade-offs between slimness and battery life. With a 5.75mm profile, it is one of the thinnest smartphones to feature a 5200mAh battery.

The SPARK Slim will be available for hands-on experience at booth 6B11 in Hall 6 at Fira Gran Via, giving attendees a chance to see how TECNO is balancing design and practicality.

Slim Design Without Sacrificing Battery Life

Most ultra-thin smartphones struggle with battery life, often requiring frequent recharging. TECNO's approach with the SPARK Slim is different. The phone includes a high-density 5200mAh battery while maintaining its slim profile, making it one of the few devices in this category to offer all-day battery performance.

It also supports 45W fast charging, reducing downtime when the battery does run low.

Sustainability and Material Choices

Beyond its size and battery, the SPARK Slim also incorporates sustainable materials in its construction. The phone's fully recycled aluminum frame and stainless steel unibody contribute to a lightweight yet durable design. The use of recycled materials aligns with a broader shift in the tech industry toward more sustainable manufacturing practices.

With a curved ergonomic design, TECNO appears to be focusing not just on making the device thinner but also ensuring it feels comfortable in hand.

Display and User Experience

The SPARK Slim features a 6.78-inch 3D Curved AMOLED display with a 1.5K (1224P) resolution and a 144Hz refresh rate.

• Peak brightness of 4500 nits enhances outdoor visibility.

• Curved AMOLED screen provides an immersive visual experience.

• Higher refresh rate allows for smoother scrolling and interactions.

For users who prioritize screen quality in a slim phone, these features aim to provide a high-end display experience without increasing thickness.

Performance and Camera Capabilities

Under the hood, the SPARK Slim is powered by an upcoming high-performance octa-core chipset, designed for efficient multitasking and extended use.

Camera System:

• 50MP + 50MP dual rear cameras for detailed photography.

• 13MP front camera for selfies and video calls.

• Interactive light band for a distinctive visual effect.

While ultra-thin phones typically don't prioritize high-end camera setups, TECNO's decision to include a dual 50MP rear camera suggests an effort to maintain a competitive feature set.