Portable Hand Crank Generator 30W Small Dynamo Outdoor Manual Emergency Phone Charger With 3-28V DC-DC Voltage Regulator ,Easy to Use

The hand crank generator uses high-tech magnetic conversion technology and rare earth magnets to deliver high efficiency power supply. The outer case is made of high-strength, aluminum-alloy composite materials, imparting light-weight, portable carrying capacity. A wide range of output voltage from 0-28V, is available for charging various electronic products or batteries. It utilizes the pulse-charge method for efficient charging and activating of the battery, to extend battery life. This generator can directly charge electronic devices, rechargeable batteries or connect with an DC-DC Converter for various output voltage requirements. In addition, it can also be matched with a Power Inverter to change DC to DC.