A power bank is not a good alternate. It's the only one. A bulky power bank is a terrible replacement for a slim battery. An hour to charge is a terrible replacement for a one minute 0-100% battery swap.
FORTUNATELY the V30 has great battery life. Not missing removable as much as I thought I would. Would have preferred they went with at least 4,000 mAh, though, and I'd love to see 5,000 mAh on a flagship in the future. If LG was serious about competing and sticking out, they'd compete with unbeatable battery life, but, just like every other OEM, they settle for "just enough". Phones with removable batteries can be water proof. My V20 with a fresh battery still has terrible battery life. In two years, though, a V20 with a fresh battery might outlast a V30 with an old one. Maybe. Maybe not. I will definitely take advantage of my extended warranty and have them swap the battery out for me. I've had great experiences with Hyperion and TrendOn batteries for the G3 and G4. In fact, those batteries have been better than my LG batteries on those devices and the OEM battery for the V20 is the worst I've ever experienced. 3 out of four of my V20 batteries die around 20%. Never had that problem before with any phone.