can i keep my tablet on the power bank while using it?

[AC Question]

If I keep my tablet plugged into the xiaomi 20000 powerbank whilst using it, will it ensure the tablet doesn't run out of battery?
I used the tablet with google maps navigating for 3 hours and it used 50% of the battery.
How long does this power bank take to charge a tablet?
Thanks,

 

[Rukbat]

The tablet will run until the powerbank runs out - however, like any lithium battery, you shouldn't discharge the powerbank (or the tablet) past 40%. As for how long it will take to charge, it depends on the size of the battery in the tablet and how much charging current the tablet draws - and that varies by model.