EnerPlex WHITE Surfr iPhone 4/4s Cell Phone Solar Battery Charger Case Battery Life Standby Time  Up to 190 hrs Battery Life Internet Surfing  Up to 4.0 hrs Dimensions Product: 126mm (4.9 ) x 60.96mm (2.4 ) x 15.33mm (0.6 ) Weight Product: 81.64g (0.18 lbs.) Power 5.0V DC 500mA (Micro-USB Port)