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The solid oxide fuel cell market is dominated by a few global players that are established brand names with a wide regional presence. The key players in this market include Bloom Energy (US), Aisin Seiki (Japan), SOLIDpower (Italy), Sunfire (Germany), UnderSea Sensor Systems (US), and Atrex Energy (US).

Button cells, often referred to as button batteries because of their small, button-like appearance, differ from cylindrical batteries like the widely used AA batteries by having a larger diameter and thinner thickness. Button batteries are categorized based on their distinct shapes, including cylindrical, square, and special-shaped varieties.

In a variety of compact electronic devices, the Optima L1154F battery is used as a button-cell alkaline battery