Muhammad Arif Harahap.Performance Test of Plant Watering System Using Solar Panel with Lithium Battery 18650(Supervised by ENDO ARGO KUNCORO). This study aims to determine the performance of a plant watering system using an 18650 lithium battery with the addition of a 50 WP polycrystalline solar panel. This research was conducted from April 2021 to August 2021 at the Workshop Machine Laboratory…