The nice thing about this 19v laptop solar charger is that if you
don't have sun, you can still have portable power by charging up the
16,000mAh internal battery in a wall socket and waltzing off to
wherever it is you need backup power. It just takes less than 3 hours
of wall charging to fill it up and the internal battery provides 3 - 5
hours of run time for your laptop with a full charge.
solar charger for laptop
http://www.espow.com/wholesale-elect...or-laptop.html