Reputable appearance and ease of use, even on the Tablet PC.

First of all: I have not bought this product on Amazon, but imported from China by a demeanor well dealer. My battery came with original Xiaomi Quick Start Guide in Chinese. My device is absolutely silent both during charging as well as the use itself. I am writing this because I find it questionable, therefore punish a product because you have received a fake device. It ultimately involves to assess that actual original device itself. Anyway, now my impression:

The Xiaomi PowerPack is heavy in the hand and is made of anodized aluminum. The aluminum looks almost identical like that of a Macbook. The pack is charged with the supplied USB-A to Micro-USB cable. Here's the only real point of criticism: The cable is high although well made, but clearly insufficient. I speak here of about 10cm. Devices which can be loaded via USB, use the USB-A output of the Power Pack.
Charging the battery needed via typical iPad USB power adapter for about 4 hours. With a full charge this battery, I was able, once fully charge my iPad mini (retinal model of 2013). There still remained after about 25% in the current pack (only 1 of 4 blinking LEDs). The time to recharge is likely to match the charging via wall socket.
For the price of ~ 20 I speak, also due to the dignified appearance, a recommendation.