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This bag is the ideal solution for school, work, outdoor activities and on vacation! The backpack has 2 solar panels with high solar energy conversion, allowing you to charge your tablet or smartphone while on the go. This way you always have a green, sustainable battery with you so your smartphone or tablet will never run out, and you are also being environmentally conscious. Besides this, you also save on energy costs! The bag has a specially designed compartment for your laptop or tablet (up to 14 inches) and multiple other sections so you can organize the bag clearly. Highlights: Large capacity and multiple sections, good for laptops, tablets, books, etc. Comfortable and adjustable shoulder straps, less pressure on your arms while carrying High-density fabric, tear-resistant, wear-resistant, durable and breathable back panel External USB charging port: Easily charge your smartphone, tablet or power bank on the inside or outside via the USB ports Solar energy adapter, USB output, charge your phone and tablet while the sun is shining Ideal for students, commuting, outdoor activities such as hiking and cycling, and for vacation! Specifications: Material: nylon and polyester Padding material: pearl cotton Product dimensions: approx. 43x30.8x14cm/16.9x12.1x5.5in Power: 14W Working current: 2.1A Working voltage: 5V Product color: black