Charging input: 16V-24V/1.6A( the power cable connector dimension:5.5*2.1-2.5mm)
DC output: 12V/15V/16V/19V/21V = 3.3A ( MAX ) ( with current limiting and temperature protection)
USB port output: 5V/=2.1A(max)
Total output power : 75w(max) , DC port:65w(max)
can install 6 18650 battey or 3pcs(must install alternation unprotect battery)
support most laptop below 19v/4a, Usb port:25w(max) support most Tablet PC.phone.
10 voltage output for chosen
Digital voltmeters head , intuitive, accurate display of the battery voltage, the output voltage.
Dimesion:162mm*82mm*22mm L*W*H

Pls notice:don't included the battery and the cable

Useful information:
Polarity of the batteries must be correct.
LED showing 12.4-12.8 means batteries are fully charged.
Charging time required: battery capacity x number of battery x 1.5 / charging current.
Charging time would be affected by diameter of the charging USB cord.

For notebook users:
The item can be used in three ways with notebooks:
1. Put fully-charged original battery in the notebook and connect the item. The notebook will first consume the item's power, and then consume the original battery's power.
2. Take way the original battery, and use the item to power the notebook.
3. When working as a UPS, connect the original power adapter to the item, and connect the item to the notebook. Upon power outage, the item will respond in less than one second.

Ideal for use with mobile phones, tablet PCs, notebook computers, music players, game players, digital cameras, etc.