20w double shoulder solar backpack introduce: Is your phone still suffering from going out without power? Solar backpacks are worth choosing. Solar power generation, converts solar energy into electrical energy, USB interface charging, convenient to charge various devices, the backpack has a high value, and the overall is very beautiful and atmospheric. Choose this 20w shoulder solar backpack to make your green travel very simple. The advantages of USB interface output, water-repellent fabric, high school shingling technology, and folding hidden design allow you to use this solar backpack to bring more convenience to travel. When there is light, there is electricity. The power of the mobile phone can be charged at the USB output interface. It supports fast charging, waterproof and leak-proof, voltage stabilization protection, and super fast charging. There are all powerful functions, ergonomic straps, easy and not oppressive. High quality zipper, smooth opening and closing, no frame drop. Independent computer compartment, convenient for daily work, waterproof and scratch-resistant fabric, high-end quality is guaranteed. Solar panels, using shingled technology. The trolley case straps meet the needs of travel convenience. USB output interface, no need to worry about waterproof and dustproof. FAQ 1. How can I place an order? You can contact any of our sales person for an order. Please provide the details of your requirements as clear as possible. So we can send you the offer at the first time. For designing or further discussion, it is better to contact us with Skype, TradeManger or QQ or WhatsApp or other instant ways, in case of any delays.   2. When can I get the price? Usually we quote within 24 hours after we get your inquiry.   3. Can you do the design for us? Yes. We have a professional team having rich experience in gift box design and manufacturing. Just tell us your ideas and we will help to carry out your ideas into perfect boxes.   4. How long can I expect to get the sample? After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 1-3 days. The samples will be sent to you via express and arrive in 3-5 days.   5. What about the lead time for mass production? Honestly, it depends on the order quantity and the season you place the order. Alway 25-28days based on general order .   6. What is your terms of delivery? We accept EXW, FOB, CFR, CIF, etc. You can choose the one which is the most convenient or cost effective for you.   7. What is the payment way? 1)TT or Wester Union for the trial order 2)ODM, OEM order, 30% for deposit,70% against the copy B/L.