How Solar Charging Backpacks Work: The solar charging backpack absorbs solar energy through solar panels and converts the solar energy into electrical energy, which is stored in the built-in battery. According to different interfaces, it can charge or supply power to various mobile phones or electronic products. It is suitable for emergencies when there is no electricity in the wild. use. When there is no sunlight for a long time, you can also take out the battery and replace it with a charged battery (disposable dry battery can also be used) to supplement the power of the mobile phone, or use a special charger to charge the storage box with the mains. The solar charging backpack is easy to operate, safe to use, easy to carry, and novel in style. It is the best charging product for home and travel.   The functional advantages of solar charging backpacks: 1. The solar charging backpack is easy to carry, safe to use and novel in style. It is the best charging product for home and travel. 2. High-efficiency crystalline silicon solar panels have a lifespan of up to 25 years. 3. No matter when and where, you can charge your mobile phone very conveniently. 4. With charging and overcharging protection, it can effectively prolong the service life of your mobile phone battery, save energy and protect the environment.   Scope of application: The solar charging backpack is suitable for mobile phones, digital cameras, MP3, MP4, PDA, etc. It is the preferred backup charging power source for digital products for outdoor operations and field outings. FAQ: Q: Are you trading company or manufacturer? A: We are professional manufacturer specialized in orthopedic and sport products. And we trade our products with our clients directly.   Q: Can you do OEM and ODM? A: Yes, OEM and ODM are both acceptable. The material, color, style can customize, the basic quantity we will advise after we discuss.   Q: Can we use our own logo? A: Yes, we can print your private logo according to your request.   Q: How many packaging do you have? A: We have five packages including PE bag, hand bag, zip lock bag, colorful box and white box currently.