【USB & Solar Charging Modes】 The solar phone charger can be recharged via USB as well as through the solar panels. However, as the charging speed is subject to sunlight intensity and panel conversion rate, which may take long time to charge. As such, USB charging is recommended for your daily use, and solar charging is for emergency purposes only. NOTE: Please fully charge solar power charger with an adapter before outdoor trips. 【Not Easy to Damage】The small solar charger is sturdy, durable, not easy to damage and can be used for a long time. The shell of the solar power bank is resistant to collision, impact and abrasion. 【Compact Design】The small solar charger comes with a carabiner, easy to attach to objects. Lightweight and portable, the solar battery makes it easy to take with you on the go. 【Wide Application】 A small solar charger is suitable for special situations such as earthquake, typhoons, tsunamis, etc. The solar power bank provides lighting to help you with all kinds of problems.