The study is about a device that is used to convert electrolysis into electrical energy. On the other hand, it is used to harness energy thru fermented buko juice in order to recharge the battery and restore electrical energy. This study presents the design and development of a typical lamp supplied by a non-conventional power source—a battery that uses buko juice as electrolyte solution. With the use of fermented buko juice, the user can make the device provide lighting. The development of an electrolytic cell using coconut (Cocos Nucifera) water as an electrolyte for perimeter lighting is a new type of emergency lamp that relies on the spontaneous redox reactions taking place in the galvanic cells of the battery as the electrical power source. The generated energy of the fermented buko juice battery depends on the number of electrolytes, the size of the electrodes, their distance from each other, and the variety, concentration, and time length of fermentation of buko juice. This device serves as an alternative source of energy that is cheap, actually almost free, clean, and accessible to everyone—almost everyone—in the Philippines, there are many coconut trees. This can be used, of course, during emergencies, like storms and other calamities, but is also beneficial even during ordinary days, when the user just wants to save electricity consumption.