A deep dive into the BLACKTIME Manta 5000mAh Magnetic Power Bank reveals a premium power source: the JOINSUN INR21700-50 cylindrical power cell.
Packing 5000mAh and 18.5Wh of energy, this 3C-certified cell provides the reliable foundation for the BT50's 20W wired and 15W wireless charging capabilities.
The BLACKTIME design is anything but conventional. The 21700 cell is housed in a dedicated, isolated aluminum compartment on the side of the device.
Safety is prioritized with spot-welded connections, comprehensive insulation, and an integrated NTC thermistor for constant thermal monitoring. The split-layout interior, bolstered by extensive thermal padding, keeps temperatures low even during intensive charging sessions.
While most magnetic chargers stick to flat, boring form factors, BLACKTIME dares to be different. By utilizing the 21700 cylindrical cell, the company has crafted a "mecha-style" aesthetic that stands out.
This structure isn't just about looks—it creates a robust frame that transforms the power bank into a versatile desktop phone stand, proving that cylindrical cells are a high-performance, stylish alternative for the next generation of portable power.
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