Power bank has 36800mAh large cell capacity. The use of industry-leading high-density lithium polymer cells makes it more compact and has a larger capacity. A high-quality, high-density battery can support thousands of charge cycles. Solar power bank has two 5V3.1A high-speed fast charging USB output interfaces, which is 50% faster than the old 5V2A output interface. Able to fully charge your mobile device more efficiently. The built-in intelligent IC chip can automatically identify the charging product and convert it into the corresponding current and voltage. It is compatible with 99% of electronic products and equipment on the market. The Solar chatger power bank is made of environmentally friendly silicone, high-strength ABS and PC materials, with a protective cover attached to the outside of the charging/discharging port, which is waterproof, dust-proof, and drop-proof, very durable. It can still work normally in various harsh environments. It also comes with a carabiner that you can attach to your backpack while hiking and charge this power bank with solar energy.