Due to their high energy density, low self-discharge rate, and long cycle life, lithium-ion batteries are a type of rechargeable battery that are frequently utilised in electronic products and electric cars. They are frequently employed in solar energy systems to temporarily store the energy produced by solar panels. A lithium-ion battery is made up of one or more cells, each of which includes an electrolyte, a cathode (the positive electrode), and an anode (the negative electrode).