charging backpack for laptop

Newest ! 20000mAh Charging Backpack for all 19V Laptop for HP Lenovo DELL Customized Laotop cables
Battery specifications:

Charger capacity: 20000mAh
Equipped with a built-in complete charging system, power bank can charge for all 19V laptop ,for HP DELL Lenovo ,etc
Battery materials: lithium polymer battery, which is also a lithium-ion battery, but using colloidal electrolyte, and compare with the liquid lithium battery which named 18650 cylindrical lithium-ion battery having a high energy density, small size, thin, lightweight, low cost and high safety and other obvious advantages, is a new battery, don't combustion and violent explosion
Power bag is removable
External one-touch battery level indication and power button: Logo button turns on or off when you press and hold for 2 seconds
With four battery indicator, press the logo button once quickly to see how much power you have left, easy to understand electricity from the face of backpack

Backpack specifications: