Bear Motion (TM) Self-Powered Hand Crank Dynamo AM/FM Radio with LED Flashlight, Alarm Flashing Light and Emergency Hand Cranked Mobile Phone Charging Function (Model No. XLN-283) Hand Crank Powered with 3 LED Lights IMPORTANT TIP: Cell phone charging function is for emergency usage only. It is only practical to charge the phone for an emergency call. To charge cell phone with the self cranking function, you need to keep cranking it to provide enough energy. For smart phones, you need to start cranking really fast until the screen shows normal charging, and then slow down to normal cranking speed. It might not be compatible with iPhone.