The fun has not stopped long

I was up to these days very fond of the charger.
The device feels not very valuable. But as long as it does its job for which it was purchased, I do not want to complain too much.
That was the case until a few days. I could simultaneously charge my Samsung and the spare battery.
What I like a bit, is the lack of battery charge indicator when you load the phone.
You load while only the spare battery, the super bright LED color changes from red to blue on the charger.
This is, however, not a star deduction on my part.

Worse, I find that the unit has adopted prematurely with sparks, bang and smoke.
Perhaps a Monday model (I am now times in favor of the manufacturer on)?

1 star deduction guiding the shaky and not really quality workmanship.
2 star deduction for early adoption.