If you have someone in the states have the items that Amazon won't ship to PR shipped to them via Prime and then have them send to you via USPS flat rate box. I sent solar power banks to my family along with these: https://www.amazon.com/Goal-Zero-Lighthouse-Mini-Lantern/dp/B016UQNGMG/ref=sr_1_1?s=lawn-garden&ie=UTF8&qid=1507526691&sr=1-1&keywords=goal+zero+mini

They are not cheap, but I tested them and they are high quality and can be charged with the same power banks used for cell phones. Plus, you can use it as a back up battery and use the front USB to charge your phone in an emergency.