Despite the pandemic and the movement toward outdoor-only performances, I remain surprised at the dearth of battery-powered bass amps and/or heads. I have a Phil Jones Double Four BG-75 with a portable power supply, but it’s just not quite loud enough on its own for my outdoor gigging needs. I also have a Roland BA-330 which functions decently as a bass amp as well as a 4-6 channel PA and runs on 8 x AA batteries. It's even possible to use those two in concert with each other and that gets me pretty much where I need to be. I even hear that a Quilter Interbass with a mobile power supply and speaker cabinet can surpass the Double Four in practical volume, though I don’t have one of those. Still, I’m wondering why there are so few options for battery-powered bass playing outdoors. I know Phil Jones has some higher-end battery-powered stuff like the Briefcase Ultimate, but that’s mighty expensive.