18000mAh Portable External Battery Charger for HP Compaq Business Notebook nx9040 - High Capacity Multi-Voltage (5V 12V 16V 19V) Power Bank

A Castle of Power: packed with 18000mAh of capacity, this portable power bank is able to charge most phones 9 times, 2 full charge for iPad/iPad 2/iPad Air/Mini iPad or a laptop more than once.
Fashionable, Sturdy, and Durable: featuring brushed aluminium alloy finish, it achieves superb heat dissipation and is well protected against wear and abrasion while exuding glamorous fashion and elegance.
Ultra-compatibility: complete with USB and voltage-adjustable DC outputs, USB(5V 2.1A)+DC(12V/4A, 16V/3.5A or 19V/3A), it features universal compatibility with most tablet PCs and virtually all USB-compliant devices on the market.
12V /16V Optional Voltage Compatible With:
-Smart Phones/iPhones/iPads/Tablets/Digital Cameras/NDS, PSP and Laptops requires 16V output(65w max)

Laptop compatibility requirements(All must be met), Please check to ensure compatibility before purchasing:
1) Voltage input: 11.5-12.5V, 15.5-16.5V or 18.5-19V
2) Current input: 4A max(12V), 3.5A max(16V), 3A max(19V)
3) A laptop connector that fits your device's power input port, see the picture for detailed tip size(outer x inner diameter in mm)