Features: 12 cell 18650 battery box, UPS type with motherboard empty power supply case, large power laptops power supply housing skin (excluding batteries), with heat dissipation holes. Equipped with DC5521 to DC5525 adapter cable, wide compatibility. Equipped with power switching button, weldingless design, it can be used immediately after being installed in a battery. Endless voltage regulation, fully covering 1 to 24V, with voltage regulation display. Wide voltage charging with charging indicator light. USB 5V port, supporting QC3.0 mobile fast charging protocol. Specifications: Material: ABS Size: approx. 19x13x3cm/7.48x5.12x1.18inch Capacity: User provided battery (not included), capacity up to: 3.7Vx40000mAh=148Wh Output power: 3 independent output port: USB 5V2-3A; 19V4.74A=90w; 9V1A Stepless voltage regulation: Port A 1-12V 19V port 16-24V is two voltage regulating port that can be continuously regulated Battery type: 18650 flat top high-quality battery. USU input voltage: 16V＜input voltage≤output set voltage, it is recommended to use 19V laptop adapter Operating temperature: -20~60℃ Port standard: DC5.5x2.1mm (positive inside and negative outside) Package Includes: 1Pc Mobile Power Sypply Housing 1Pc DC5521 to DC5525 Power Cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.