I'm just curious about how I'd charge my iPhone using a portable power bank while on the go if my Lightning port is occupied with my earbuds. Getting those ext

I'm just curious about how I'd charge my iPhone using a portable power bank while on the go if my Lightning port is occupied with my earbuds. Getting those extra battery pack cases is a nuisance, unnecessarily increases the phone's size. A portable power bank is much more flexible. Plug it in when I need it, keep it in my pocket if I'm on the go. I know that wireless charging is on the table, but how would that work as I'm walking on the sidewalk? Would it stay flush with the iPhone via a case? If so, doesn't that go back to how a battery pack case makes the phone unnecessarily large? Or do I put it on the phone only when necessary? If I put it on the phone only when necessary, do I take my preferred case off whenever I need to charge on the go? Or do I buy some sort of Lightning Y-cable to make this work? This is the one question I want answered. Or maybe Bluetooth earphones will have good enough quality and battery life for none of it to matter. Who knows?