Abstract
The high demand for energy requires humanity to search for alternatives to improve and sustain the standard of living in the modern world. As a way to explore other possibilities of energy sources during emergencies as well as the development of eco-friendly technology, this paper aims to design and construct a multi-purpose mechanical energy charger using the product design and development method of research. Findings showed that the device is capable of producing electricity with its mechanical hand-crank for smartphones, rechargeable mini fan, and rechargeable flashlight. Meanwhile, the device is cheaper compared to the existing charging device in the market. It was also assessed that the device has social acceptability and technologically sound attributes based on its effectiveness, portability, usability, and user-friendliness. After the design and fabrication, it is recommended that there is a need to further improve the device with longer trials and verifications to obtain its most desirable performance for technology utilization and commercialization.
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