Solar bags are mobile solar power generators designed to charge virtually all handheld electronics. For this there is a Powerful Solar Panel which is embedded in the outside of the bags This panels can generate power up to 14.7 watts, which is enough to fully charge a typical laptop from a day of direct sunlight All bags come with a battery pack which stores any surplus power generated, so it is available when you need it - not just when the sun is up. The battery packs can also be charged using the included AC travel charger or car charger All bags include standard adaptors for common cell phones and other handheld devices. The Generator also includes common laptop adaptors. The solar panels are lightweight, tough, waterproof solar panels. So it will be easy to carry it around. The main disadvantage is that if your laptop runs its batter down in say 4 hours, it will take about 12 hours minimum to recharge it, in bright sunlight. It would be beneficial to people who are out in the sticks somewhere far from civilization doing research.
