The current disclosure teaches and describes a generator assembly and related hand crank devices. One embodiment of the device may include a traditional generator, a handle and a crank link. The crank link is rotatably connected to the handle in a perpendicular position. A user may hold the handle and wield the hand crank device to make the crank link rotate around the handle like a clock hand, enabling the generator to provide power to the hand crank device. Such wielding motion may also be driven by other forces. The current design allows the user to charge the device with only one hand and with ease. In addition, the “functioning” components of the current hand crank device may be housed in or attached to either the handle or crank link, or both. Other components may also be introduced to make the generator assembly more efficient and easy to use.