I was a user of mi 10000mah power Bank. It was a useful power Bank with light weight design and durable material. Then I purchased the one phone with bigger battery life so I thought to purchasing a bigger power Bank so I went for this but my experience was not do good.
First of all it is very bulky. It's weight around 5 mobile phones which is sometime very hard to carry.
It's charging time is very high. It takes almost 3-4 hours to get fully charged.
It's built quality is not upto the mark. It is full of plastic and Hence not able to take any damage if it gets dropped like earlier one.
It's ports trends to start losing. After 2 months it's both USB port start losing which sometimes gets annoying.
So if you want to purchase mi power bank then go for the 10000mah only.