I bought one of these from Etsy six months ago and it’s been working perfectly.
Glad to hear it. I bought the smaller variant (1 panel, 18650) a couple days ago. I'm traveling so it'll take another couple weeks to catch up with me through my mail forwarder.
it’s great for at least two scenarios. If your local cell towers stop working
A related scenario: if there wasn't cell coverage at a location at all. Boondockers sometimes camp in areas with no cell coverage, or coverage that only works with cell boosters or LTE/5G routers with external antennas on the roof of their rigs.
If you’re going to a protest or other event where you would prefer not to be tracked or monitored
Given the state of play in the U.S. I wouldn't blame them...