You could stick one of my generators on a backpack and use it to power a laptop.
From the forbes.com
A donation of $25 pays for one backpack full of school supplies for one student.
From the thenewstribune.com
A female purple martin wearing a miniaturized geolocator backpack and leg bands.
From the newscientist.com
Adjustable straps turn it into a backpack or a shoulder bag, with clutch handle.
From the independent.co.uk
It is 100 percent leakproof but should not be stashed upside down in a backpack.
From the sacbee.com
Participants can win disaster supply items such as a backpack and first-aid kit.
From the newsobserver.com
The men left behind a backpack containing four alcohol bottles with pour spouts.
From the thenewstribune.com
Also included is a pattern for a backpack, a yoga mat sack and a bottle carrier.
From the buffalonews.com
This is the second year South Carolina has participated in the backpack project.
From the thestate.com
More examples
Hike with a backpack; "Every summer they are backpacking in the Rockies"
A bag carried by a strap on your back or shoulder
A backpack (also called rucksack, knapsack, packsack, pack, or Bergen) is, in its simplest form, a cloth sack carried on one's back and secured with two straps that go over the shoulders, but there can be exceptions. Light weight types of backpacks are sometimes worn on only one shoulder strap.
37signals is a privately held web application company based in Chicago, Illinois, United States. The firm was co-founded in 1999 by Jason Fried, Carlos Segura, and Ernest Kim as a web design company. 37signals also produces a blog, . ...
Backpacking (in US; tramping, trekking, or bushwalking in other countries) combines hiking and camping in a single trip. A backpacker hikes into the backcountry to spend one or more nights there, and carries supplies and equipment to satisfy sleeping and eating needs.
(Backpacking (urban)) Backpacking is a term that has historically been used to denote a form of low-cost, independent international travel. Terms such as independent travel and/or budget travel are often used interchangeably with backpacking. ...
(Backpacking) A hike which extends to at least one overnight stay where the essentials (food, shelter, clothing, etc.) for that stay are packed.
(Backpacking) A term with a loose definition, not everyone agreed with my definition of what is backpacking.
(Backpacking) Carrying a sleeping bag, food, and other gear into the wilderness with the intention of staying out at least one night. Gear typically is carried in a backpack.