What's the best way to charge?

[MountainGirl]

This recent and still ongoing snow event confirmed our need to be ready. We had just enough of a break yesterday to dig out and run down for more gas for the generator. Our solar system is big enough for our needs, but only up to a point... and that point is having 2 weeks of no sun, and no gas left. We were right at the edge of shutting down all electricals (to save the last of the batteries for the well pump) when the break came. Oh, we'd have survived: wood heat, snow for water, plenty of food stocked etc... but it would be nice to be able to charge a phone.

Does anyone have any ideas, input, recommendations, etc, for a portable solar charger for a cell phone? Or maybe a solar charger into a little battery pack to charge a phone with? Not sure which way to go here.... I know it takes sunlight (lol) and likely wouldn't have done the job these last two weeks...but... IF our big system ever went totally tits-up for good - a phone would be a nice thing to keep functional somehow.

I've searched online to see what's out there, and how to do this, but reviews vary too much... so anything you can share about how you would do it - would be very much appreciated. Thanks!