With Gold Mobility in particular, I wouldn't recommend using a power strip. They are in the process of upgrading their entire fleet again and are planning on using 50 Ah batteries on their Victory 10 models. This has made it necessary for them to use 5 AMP chargers and the wall outlet itself could get overloaded with that much draw going through a single socket. At bare minimum plug them into separate sockets on the same outlet, preferably plug them into separate outlets that are on separate circuits in the room for best results and that is true with any charger, even lower load ones.