Lithium batteries come in a variety of configurations, each with its own cathode, electrolyte, and separator. They come in a variety of designs and sizes to suit a wide range of applications. They have a wide range of applications due to their high voltage of 3 volts, high capacity, wide temperature range, and extended shelf life (due to low self-discharge).

Car keys, watches, medical devices, toys, LED lamps, and, of course, any type of memory backup are among the most common applications.

They are available in a number of sizes. The cells are either utilised in a battery holder or have pins welded to them.