Dear Xiaomi-miui.gr, there is a good news for you. Now, 16000mAh battery Xiaomi Power Bank is in stock on Vifocal , and the price is $29.99 usd, the 16000MAh XIAOMI Power Bank Dual USB for Smartphone Tablet Notebook. if you have interesting in it, you could go and buy it.
Buy 16000mAh Xiaomi Power Bank: 16000MAh XIAOMI Power Bank Dual USB for Smartphone Tablet Notebook

Model: original XIAOMI power bank
Rated capacity: 3.75V/16000mAh(TYP)
Battery type: 18650 battery x 5
Input: DV 5V, 2.0mAh(TYP)
Output: DV 5V, 2.1mAh(TYP)
Charging time:
about 9 hour(use standard cable with 5V/2A charger adapter);
about 14.5 hour(use standard cable with 5V/1A charger adapter);
Ports: 1 x Micro USB port for charging itself
2 x USB port for charging other devices like smartphone, tablet pc, notebook, etc
(Each USB port supports 5.1V/2.1A output; max 5.1V/3.6A output when dual USB port working)
Size: 145 x 60.4 x 22mm
Weight: 350g
Charge temperature: 0℃-45℃(TYP)
Discharge temperature: -20℃~+60℃(TYP)
Buy 16000mAh Xiaomi Power Bank: 16000MAh XIAOMI Power Bank Dual USB for Smartphone Tablet Notebook

Model: original XIAOMI power bank
Rated capacity: 3.75V/16000mAh(TYP)
Battery type: 18650 battery x 5
Input: DV 5V, 2.0mAh(TYP)
Output: DV 5V, 2.1mAh(TYP)
Charging time:
about 9 hour(use standard cable with 5V/2A charger adapter);
about 14.5 hour(use standard cable with 5V/1A charger adapter);
Ports: 1 x Micro USB port for charging itself
2 x USB port for charging other devices like smartphone, tablet pc, notebook, etc
(Each USB port supports 5.1V/2.1A output; max 5.1V/3.6A output when dual USB port working)
Size: 145 x 60.4 x 22mm
Weight: 350g
Charge temperature: 0℃-45℃(TYP)
Discharge temperature: -20℃~+60℃(TYP)