LR44 1.5V Battery is a 1.5 volt alkaline button cell battery designed for general use. The LR44 1.5V Battery is widely used in watches, calculators and medical devices. A button cell battery is a small, round battery that is 11.6mm(0.457 inch) in diameter and 5.4mm(0.21 inch) thick. An alkaline battery is a battery that uses manganese dioxide and zinc to create a reaction, and it is an economical alternative to silver oxide batteries, while still providing high capacity and long usage. The LR44 1.5V Battery is a primary cell battery, and it is non-rechargeable.