This looks to be the newest, most powerful out of the group: http://www.amazon.com/gp/product/B012YUJJM8/ http://www.amazon.com/gp/product/B012YUJJM8/ Here's t

This looks to be the newest, most powerful out of the group: http://www.amazon.com/gp/product/B012YUJJM8/ http://www.amazon.com/gp/product/B012YUJJM8/ Here's the full set of products: http://www.ianker.com/Solar-Chargers/category-c53-s1 http://www.ianker.com/Solar-Chargers/category-c53-s1 There are Amazon links on each individual product page.