2000mAh sounds heavy to carry around and likely a problem in airports. Suvarnabhumi has a limit on 16000mAh bricks in carry on from memory. Have a read of this...you may not need all that power. https://www.completemerchandise.co.uk/blog/power-banks-mobile-chargers-many-mah-need/
I fly a lot and Im tired of these arsehats treating the overhead bins like its the tardis, bringing over stuffed bags plus a "personal item" which is often a big shopping bag. It doesn't matter if your American, Indian, African or Chinese. They all do and its not acceptable or within the term and conditions of the ticket. The limit is the limit.