How to tell the fakes? 
Xiaomi Official link: http://hd.mi.com/f/zt/hd/2014082602/index.html
Xiaomi Officail Product Authentication link:  http://www.mi.com/verify/

Here are some easy ways to spot fakes,
If you ordered from a Chinese seller and the manual is in English.
If the packaging has no MI verification sticker or serial number.
If the power LED’s are bright and even illuminate the white casing.

Video (How to identify): 



More questions and discussions are welcome to post here: 
(Note: this video is for 10400mAh, so it has a little different from 10000mAh. For example, the 10000mAh has a white color inside the usb cable.  )
Look inside our Xiaomi Powerbank

Best partner in Pokémon GO journey.

Description:

Battery capacity: 3.6V 10000mAh
Interface: Micro USB(input), USB(output)
Size:91*60.4*22mm
Input: 2.0A(TYP) DC 5V
Output: 2.1A DC 5.1V
Charging time: about 5.5hours with 5V/2A charger
Charge temperature: 0℃-45℃
Discharge temperature: -20℃~+60℃
Weight: 207g

Compatible with iPhone, HTC, Samsung, smartphone and Tablet PC(the power bank will adjust the output power automatically to meet different devices' needs)
Human engineering round conner design, more comfortable to handle.
With anodic oxidation technology, the color will keep fresh.
 
Function: Short-circuit Protection, Input Overvoltage Protection, Output Over-Current Protection, Onput Overvoltage Protection, Over-charge Protection.
Four LEDs to show battery level.

Package include:

1 x Power Bank
1 x Micro USB Cable 
1 x manual     

More Details: