I saw one of these for the first time a few years ago and thought how great it would be to charge my laptop using solar power!
Right now on Amazon you can grab this Goal Zero 19010 Guide 10 Plus Solar Charging Kit  for $88.99 shipped.
- Keep your power hungry phone juiced and ready for you to use
- Power up your tablet for 25 percent longer
- Small and compact enough to carry with you always and power up anywhere
- Handy built-in LED flashlight to help you search in your dark backpack or purse
- AA rechargeable batteries included
The Goal Zero Guide 10 Adventure Kit is an ultra-lightweight USB and solar charging system that fits in your pocket. It includes the Nomad 7 solar charging panel and the Guide 10 battery charging system. It can be used as a single unit power pack to power your device, or as a power source to recharge batteries for use in AA or AAA battery powered devices.
This price should last all day today (6/19) but they do occasionally run out of stock!