I'm trying to find a way to charge some 18650 and CR123 batteries from a portable solar panel and cant really find anything. I have a few flashlights that run off of 18650 and Cr123 and would like a rechargeable option when camping and backpacking. Also with this recent hurricane I realised I cant even recharge off of my power banks. I did some Google searching and it looks like all portable solar panels use USB but I cant find a charger that feeds from a USB. Also, can someone recommend me some rechargeable CR123 batteries?