1. No welding required for the battery, ready to use after installation. 2. Stepless voltage regulation, full coverage of the 1-24V range, with voltage regulation display. 3. Wide voltage charging. 4. DC isobaric UPS function. 5. Support Qualcomm QC3.0 mobile phone fast charging protocol. Capacity: User-provided battery, maximum capacity: 3.7Vx40000mAh=148Wh Output power: 3 independent output ports: USB5V2-3A; 19V4.74A=90 watts; 9V1A Stepless voltage regulation: A port 1-12V, 19V port 16-24V are two voltage regulation ports, which can be continuously regulated Voltage regulation method: high-precision stepless continuous voltage regulation, accuracy 0.1V, the voltage will not change after adjustment, no need to reset every time the machine is turned on Battery type: 18650 flat head high-quality battery Battery cycle life: about 500-700 times when the capacity drops to 80%, more than 20 times when the capacity drops to 50% 00 times, the life of the power supply is more than 5 years UPS input voltage: 16V{Less than}Input voltage{less than equal}output setting voltage, it is recommended to use a 19V laptop adapter Charging power: 0.15C charging, 16.8V 1:5A=25 watts, fully charged in about 6-7 hours Using temperature range: -20-60 degrees Celsius DC interface standard: DC5.5, 2.1mm (positive inside and negative outside) Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:Blue&Black Material:plastic Package Contents: 1 x UPS type with motherboard empty box (without battery) 1 x DC5521 to DC5525 cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.