I've been using this:
I know you weren't asking for a review, but these things are next-to-useless in an actual emergency. The batteries in these things are tiny; they barely give you a 20% charge. Which would be fine except the solar panel on it is only enough to maintain the clock on it. If you run it with the radio on in the sunshine it dies after about an hour. They're only useful as radios and when totally dead you still have to crank it constantly just to listen to the radio. It's not enough power.
Get a big USB power bank maybe? https://www.amazon.com/dp/B01G1XH46M/ref=cm_sw_r_cp_api_aeQjybY0KK1KH