Thanks for choosing Zebora 2 solar panels power bank backup charger. Here are some tips that make the item unique: Fast Charging: The solar panel is made with the best monocrystalline silicone. Its highly effective absorption and transformation promotes the full charging in about 18 hours to get full charges. The solar charging can make as an effective and major way when you are outdoors. Transform and store the solar power effectively: Unlike the multi solar panels charger, Zebora 2 solar panels charger is equipped with a power bank which holds the chargers first, and then charging your devices with a stable input. This will protect your expensive tool from the unstable current varied with the strength of sunlight. High Capacity: The Zebora solar power bank carries 10,000 mAh capacity which can charge your devices more cycles. Easy to Carry: Although it has multi solar panels, it is foldable and easy to carry. The size is almost the same as an iPhone 6 when is folded.