I charge the battery with the charger 2.1A from S4. Works perfectly.
Ridiculous I find the 1.0A output. When you load the USB output will be warm.
Therefore I get the anchor Astro E7. Since limited phone charging current.
And he is 4x as large.
Once it's even happened that I have my S4 charged 5x and it had always shone all 4 LEDs. Without the battery recharge.
No idea how or why.
I had the S4 even before 114% battery.
Equally true is the S4 the hybrid battery (I call so) to 30% empty played 3min are let times and then he was back at 80%
No, I was stupid to make a screenshot.
When S5 I had with the Android version of Flappy Bird this.
The Facebook Crafter