that's the most generic common china made powerbank you can find anywhere...
i've seen the exact same one where sellers claim the capacity ranges from 12000 mah until 30000 mah. I highly doubt so, if you ask me they're all the same crap with the same capacity. Sellers just try to bs the capacity to get more sales. One of the deal website selling the same exact one claiming its 20000 mah. I asked the seller how many full charge for note 2 and he said 2.5 times...

if you ever see a powerbank that looks exactly like that, stay away..