TECNO has unveiled the groundbreaking SPARK Slim at MWC 2025 in Barcelona, Spain. This ultra-thin concept smartphone is the industry’s thinnest device equipped with a 5200mAh battery.

The SPARK Slim boasts a sleek 5.75mm profile and features a 6.78-inch 3D Curved AMOLED display with a 144Hz refresh rate and a peak brightness of 4500 nits.
According to TECNO, the device is made entirely from recycled aluminum using an integrated die-casting process and advanced stainless steel unibody materials, which offers a refined and ergonomic feel.
On the camera side, the SPARK Slim sports an advanced 50MP+50MP dual rear setup and a 13MP front shooter, enhanced by an interactive light strip that produces dynamic and humanizing lighting effects.

Despite its slim design, TECNO managed to equip the handset with a high density 5200mAh battery, ensuring all day use in a compact form factor. It also supports 45W fast charging for quick top ups.
It remains to be seen if the SPARK Slim will become a mass-produced product, but it demonstrates TECNO’s commitment to innovation and leadership in the industry.
Stay tuned for more updates on the TECNO SPARK Slim and other announcements from MWC 2025.