BioLite Solar Panel5+ will keep your smartphone and other electronic devices powered while trekking outdoors. The portable solar panel generates five watts of power in direct sunlight. It has an integrated sundial to keep the board aligned directly at the sun for optimum charging and maximizing efficiency. Designed with a built-in 2200mAh battery that can store energy as reserve power to provide energy at night or even in cloudy weather consistently. Given its durable and lightweight design, this is one of the best ultra slim solar panels. A 360-degree kickstand placed at the back of the device for easy setup even on uneven terrain.