S. Fatimah, P. Marwoto, and S. E. . Nugroho, “The Electrical Characteristics of Fruit Peel Waste as a Biobattery in Terms of Fermentation Time and Coconut (Cocos nucifera L.) Pulp Concentration”, jppipa, pendidikan ipa, fisika, biologi, kimia, vol. 9, no. SpecialIssue, pp. 1008–1016, Dec. 2023.