Thank you for this tip... This really surprised me I have a very cheap (around 5 bucks) wallmart car charger it's an unknown brand it just has a V as the brand, the output says 5VDC 1A.
My GS4 is running Shostock v2.3 via safestrap
However according to catlog this charger pumps
1200 screen ON with the included cable or the stock S4 cable
1500 screen OFF with the included cable or the stock S4 cable
700 screen ON/OFF with stock S2 cable
So next give a run of the included cable on my laptop USB ports and it's as follow.
Port 2.0 920 screen ON/OFF
Port 3.0 1100 screen ON/OFF
Port 3.0 1000 screen ON/OFF
Port 3.0 700 sceen ON/OFF (WTF ?? lol )
Also this cable doesn't do data..
Stock S2 cable with S4 charger it only pumps 860 screen OFF/ON
Oh yeah and the stock GS4 charger/cable combo shows 1200 screen ON 1900 screen OFF
So definitely also the kind of cable plays a big game here.
BTW: If someone want picture of that cheap charger let me know, but they can be found at the registers, it has 3 plugs Mini USB/Micro USB and other one that I don't remember what kind it's