This model is a switching-mode power supply, operation at input AC voltage 11V to 14V and output DC voltage of 5VDC at 2000mA max load, with many protection functions use for the notebook computer, power supply by 12V car battery
Electric Characteristics:

Specification
1. Rated Input Voltage: 11-14V
2. Input Rated Current: 0.5AMP
  Input Min. Current 100mA
3. Output Power: 12.5W
4. Output voltage: 5V

Output current: 2000mA max

Overload protection
Short circuit protection