“…Similar studies have been carried out, such as research that utilizes the skin of the zalacca fruit which is used as active porous carbon as anode in sodium ion batteries (Arie et al, 2018), research on electrolyte paste characteristics of tropical almond fruit (Togibasa et al, 2019), banana peel as a battery material with a porous structure (Zhang et al, 2016), bio battery from areca peel paste (Ansanay, Walilo, & Togibasa, 2019), and studies utilizing papaya fruit for sugar-air alkaline battery (Proyera et al, 2016). However, there is no study about the bio battery with the electrolyte mixture of pineapple peel and cassava peel.…”