3–101 Battery Design A satellite requires a battery with an open-circuit voltage vOC = 36 V and a Thévenin resistance RT =10 Ω. The battery is to be constructed using series and parallel combinations of one of two types of cells. The first type has vOC =9V, RT =4 Ω, and a weight of 30 g. The second type has vOC =4V, RT =2 Ω, and a weight of 18 g. Design a minimum weight battery that meets the open-circuit voltage and Thévenin resistance requirements.