See this interesting idea that I have found. Picard Lederwaren company from Germany manufactures laptop bags, travel bags and other that have solar cells. It is enough to connect your computer to the internal cables and on the go, or carry it through the city, its battery will be recharged. The same principle can be used for mobile phone, MP3 player and so on. The ‘on-board’ Li-ion battery of these bags provide up to 14.4V and 4,500mAh, powerful enough to charge your laptop and also cellphone or MP3 player. Here are some pictures of these bags. The Picard Solar Messenger and Business Backpack goes for around $ 1,100.- and the Solar Trolley for around $ 1,375. You can search for other products of this company on google.
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