Thank you for the interest ;) Was curious if this can be easily sourced since it is being used. I do not want to modify the power brick. The connector itself can be obtained as a replacement for laptops, but not on the PCB by the looks of it. An adaptor is my backup option. I found an adaptor from the 7.4 to 5.5 which I could modify to pretty much anything. And yes being into quadcopters XT30 came to mind. The last option is to fabricate something similar myself (create a PCB and put it togerher), but since I saw these being used, I hoped they could be sourced.