Just a thumbs up to Banggood, won this on their 9.9 lottery ;)!
The battery was sent out pretty quickly and arrived within 2 weeks after being shipped.
Xiaomis dark rose-red which isnt exactly the most manly color out there :D!
Packaging box with another box inside that slides out and contains battery, USB cable and instructions leaflet in Chinese.
Build quality feels solid, bank looks good and is said to deliver around 3.3Ah at 5.1V and 1A at 155.6g(vs 6.25Ah of 10'000mAh MiBank weighing 204.5g without usb cable and port covers) and at 90% efficiency(compared to 88% of its bigger brother).
Compared side by side with its "bigger" brother, 10'000mAh power bank.
(I use silicone USB and Micro USB plugs on all of my mobile devices to avoid small debris to collect inside devices USB/Micro USB ports.)
Is it good investment? Given the solid reputation these power banks get, Id say yes, if you need thin, portable power bank that could recharge your phone at least once with ability to recharge other devices as well.
If you dont plan on charging anything but your cell phone, perhaps backup battery(if your phone has replaceable battery, that is) would be much better, yet less and less phones today come with user replaceable batteries and they tend to cost much as well while cheaper non-brand alternatives are potentially neither safe nor reliable.
If(another sentence starting with "I") on the other hand you need more juice, 10Ah model seems like the perfect choice given its still relatively small size and almost identical price(I bought 10Ah bank for around 12$, silver 5Ah goes for around the same, red ones more expensive).
Personally was looking at this power bank a while ago with the idea of having even smaller, pocketable power bank, yet twice the capacity of 10Ah model at the same price is something worth considering so didnt buy one.
The choice is yours.
Thanks for reading!