Generic Solar Phone Charger
This "solar charger" has a panel the size of a credit card. At peak solar output, it'll charge your phone in roughly... 47 hours. You'd get more power rubbing a balloon on a cat. The reviews are 80% bots and 20% people who left it in the sun for a week and got 3% battery. The plastic shell cracked after one afternoon outdoors. One reviewer said "I think this actually DRAINED my phone." We believe them.
Verdict: Unless you're charging a single AA battery over the course of a summer, skip it.
Anker 24W Solar Charger
Actual usable solar panels, charges a phone in 3-4 hours of direct sun, foldable, and won't disintegrate in light rain.