The charging power efficiency with desktop & laptop and even in car will be almost same as original charger.
Anywhere you go with laptop in meeting room or office, you will get very fast charging convenience without adapter.
USB 2.0 Battery Charging Specification 1.1&1.2 Selective SDP mode and DCP mode by switch SDP(Standard Downstream Port) : enable data communication and 500mA charging DCP(Dedicated Charging Port) : unable data communication and 2,000mA charging.
When you''re always on the go and usually charge your phone or tablet with a laptop or PC in the office or an USB port in the car, have you noticed that charging this way takes a really long time? And it''s almost impossible to actually increase your phone''s battery power if you''re using it as a GPS even while your phone is plugged in into your car''s USB port; that''s because your phone is using more power than the power your USB port can supply to your phone.
When you connect your device (i.e. phone, table, etc.) to your USB port(on your laptop or in your car), USB port automatically prepares to communicate with your device and provide limited electric energy: to sync AND charge. Simply put, attempting to transfer data and charge at the same time is the main reason why charging is so slow.

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.5 inch
Height : 1 inch
Length : 5.5 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 0.32 ounce (View shipping rates and policies)

ASIN : B00IXHC0JG