General description Digital display with power supply, detachable, no welding required, and equipped with anti-reverse connection protection. This charging box can accommodate 12 flat head 18650 batteries and can function as a power bank when the built-in battery is used. The normal version requires a charging cable, while the version without a cable allows for quick charging. This handmade DIY mobile power kit is designed for users with larger charging needs, featuring three types of charging interfaces: Micro, USB, and Type-C. Technical specifications Model: T12 Series with Light Battery type: 18650 x 12 Flat Head Battery (Free Welding) Size: Thickness 43mm, Width 80mm, Length 153mm Inner dimensions (without spring): Thickness 38mm, Width 72mm, Length 110mm Maximum output/input power: 5V-2.1A Usage Power display indicates remaining power for better charging management. Comes with a lanyard for convenient portability. Other information Package Contents: 3 x 18650 Power Bank Case