The PX625AB is a 1.35V mercury-free Zinc Air cell manufactured by Duracell. It is part of their Procell family of professional, long-lasting and reliable batteries designed for professional heavy duty use. It is commonly used in hearing aids, medical and scientific equipment, calculators, watches, children’s toys and more. The PX625AB battery is a cylindrical battery with a pin contact on the bottom, and a flat top with a printed “+” symbol. It is approximately 11.6 mm in diameter, and 17.2 mm in height. This Zinc Air cell has an estimated output of 1.35V and a capacity of 4.5AH, making it an excellent choice for many different applications.