Needing your laptop when you are spending time outside and not having any way to charge it can be frustrating. The Levin 20W Foldable Laptop Solar Charger happens to be portable charger that can support your laptop for hours. It has a 16000mAh laptop external battery to offer you 5 hours of extra battery life when fully charged. Its LCD display shows capacity and voltage level.
This solar charger works for tablets and smartphones. It is small enough to fit in any bag. You get 7 voltage levels to handle different devices. Not cheap but quite handy.