I am using a 12v SBooster with my ZS. I know, it does not make sense because the SBooster costs almost as much as the ZS, I told my dealer it does not make sense when he suggested it, then he connects the SBooster to the ZS…. and after 30s, I bought it. I do not know if a lower cost power supply can have the same effect but I can confirm that the ZS responds very well to a better PS.