This solar charger can't store electricity.
Upgraded Triple USB Ports: This 28W solar panel charger has 3 USB-A ports(each 5V/2.4A Max) with smart charging technology that recognizes your device smartly and provides optimal charging speed, which varies with different devices. CE/ FCC/ RoHS certificated, BigBlue solar phone charger ensures 100% safe charging with overcharging, overheating, and short circuit protection.
High Energy Conversion: A highly efficient folding solar panel can convert up to 23% of solar power into free energy under enough sunlight. Its special PET polymer surface protects it from occasional rain or wet fog, all the ports are covered by rubber cover to protect them from dust or water damage. Note: the junction box is not waterproof.
Wide Compatibility: Attached USB cable for almost all 5V Android devices and some DSLRs, or Apple devices ( don’t provide the lightning cable for Apple devices). Please unfold this portable solar panel in direct sunlight outdoors, then connect your cellphones or battery to the USB-A port. Note: The actual output will depend on a lot of factors, such as the temperature, sunlight intensity, angle etc.
Easy To Carry: With a compact and portable size (11.1 × 8.3× 0.8in folded), BigBlue foldable solar charger is small and light enough to fit into any camping backpack, hiking daypack, or emergency kit. They’re also good for stashing in an emergency kit during hurricane season. Note: This solar phone charger can’t store electricity, it just can work in enough sunlight.
Package & Support: You will get a BigBlue 28W Solar Charger, 50cm USB Cable, User Manual and our friendly Customer Service. Note: Any cloud cover that arrives may influence the charging speed. We suggest you replug the device and reopen the solar panels if the charging is too slow, and please confirm if your devices come with overheating protection when your devices stop charging suddenly.