Is using a portable power bank a good way to solve range anxiety?

I’m looking for a relatively lightweight solution to carry in my car for emergencies or quick top-ups during day trips. I don’t need to charge the wheel from 0 to 100%, just enough to relieve some serious range anxiety.

I’ve been comparing a few stations under the 15lb mark:

https://www.jackery.com/products/explorer-500w-portable-power-station
https://iallpowers.com/products/allpowers-volix-p300-portable-power-station

I’d love to hear pros and cons from anyone who has used a compact PPS like this for their wheel.