The Voltaic Solar Charging Bags and Backpacks feature three lightweight, waterproof solar panels that generate up to four watts of power – enough energy to charge nearly any handheld electronic device. By carrying a solar charging bag, business professionals, students and travelers now have the ability to charge their mobile devices with renewable power on-the-go and unplug from the electricity grid. Applicable electronic devices include: blackberry devices, MP3 players, digital cameras, two-way radios, PDAs and nearly all brands of cell phones.

Office Depot carries three products in the assortment:

• Voltaic Converter Solar Charging Bag: Use the Voltaic converter as a standalone daypack, or easily attach it to another bag utilizing the included fastek buckles. The bag is fully padded to carry and protect a notebook computer and includes a lined MP3/sunglasses pouch. It features high-density padding in the shoulder straps and back panel for all-day comfort, and can be worn as a backpack or a sling bag.
• Voltaic Messenger Solar Charging Bag: The Voltaic solar bag is a mobile solar power generator designed to charge handheld electronic devices without a power outlet. This bag is ideal for the professional or businessperson traveling to the office and/or going on a short business trip.
• Voltaic Solar Charging Backpack: The spacious Voltaic Backpack has 1,850 cubic inches of storage space, including multiple pockets and wire channels for your electronic devices. It features high-density padding in the shoulder straps and back panel for all-day comfort, and nylon mesh backing for better air flow. It also includes an adjustable phone/MP3 pouch on the shoulder strap, a padded laptop sleeve, and a lined pouch inside. This backpack is ideal for a weekend hiking trip or to use as a large daypack.

Beyond providing energy-savings, Voltaic Solar Charging Messenger Bags and Backpacks are also made largely from recycled plastic soda bottles. The bags and backpacks are priced from $179.99 to $219.99.