for zombie apocalypse Solar charging backpack that can charge your laptop. From Voltaic. This can be your bug out bag. Charge your phone and flashlights and laptop. For daily use, not only in case of any emergency.
The Tag Along Solar Battery with USB port to allow you to charge your phone or any gadgets works on inbuilt Li-Polymer battery similar to the batteries found in mobile phone. It continually stores sunlight to the inbuilt battery when exposed