Fuel up from the power of the sun. Store solar power in the case, and turn it on when your ready to use this backup power on the go. The internal 2500 mAh battery provides over 100% extra power, the semi-rugged design protects your iPhone from nicks, scratches, drops. Fusion’s solar module provides power for whenever access to an outlet is unavailable. Even in short solar exposure your provided with meaningful power! You can plug in and charge the internal battery through AC/DC/USB, or expose the solar panel to direct sunlight. Be prepared for any emergency, anytime, anywhere!