Question: how long to charge mi power bank 20000mah first time?
Answer: Charging in the fast lane The new Texas Instruments control chip in each 20000mAh Mi Power Bank supports rapid charging. Compatible with 5V/2A, 9V/2A and 12V/1.5A charging, the power bank takes just 3 hours to charge 11000mAh and 7 hours to charge fully 3- that's 44% faster than two 10000mAh Mi Power Banks combined.