https://www.amazon.com/Lixada-Portable-Monocrystalline-Climbing-Activity/dp/B06Y655DJD

Google JMT lixada 10w. A user used this one.

Great thoughts. I didn’t know about the new power bank option.

I’ve used an even lighter lixada panel weighing only 2.8 OZ. (Source) I’m not a through hiker but for wilderness trips, this has similarly allowed me to cut my power bank need and weight. For wilderness mountain trips in late summer and Fall, it’s been no problem getting the sun I need. I’m planning to do some longer wilderness trips where I may go 10 days or more without bring able to plug in, so this along with the power bank you mention should allow minimum weight to power many days.

I haven’t used this panel enough to give a long term review, but my short term use has been good. I did have the USB port come loose and read this is a common problem, but it’s easy enough to glue it down better.

I agree the downside is it’s a more complex system with more to potentially fail. Of course it’s not practical for those hiking the green tunnel, but for sunnier situations it can save a lot of power bank weight.

https://www.amazon.com/gp/aw/d/B06Y655DJD?psc=1&ref=ppx_pop_mob_b_asin_title

Uh, I see now that not all of Lixada's models list the above charging efficiency. This one does.