Question Dual Battery Case S4 i9500 ??

any1 knows a case that is capable of using 2 batteries at once like the dyconn case ... ??
so that i can use both my samsung battries at once in the case ...

http://www.youtube.com/watch?v=jAGfy8OWVAg



samsung galaxy s4 i9500- 8 Cores YAY !!!
NOT ROOTED

Android Version - 4.2.2
Baseband Version - I9500DDUBMF8
Kernel Version - 3.4.5-1133023
Build No. JDQ39.I9500XWUBMG5

Press "Thanks" if i helped !!!