The LR44 Button Cell Batteries are essential accessories for maintaining the functionality of your Testo measuring instruments. Compatible with devices such as the testo 105 one-hand thermometer, known for its ergonomic design and suitability for food temperature checks, and the mini penetration thermometer, ideal for quick air and core temperature measurements, these batteries ensure your equipment operates reliably. Each battery delivers a 1.5V output, providing stable and consistent power. The pack of four is particularly practical for professionals who rely on their Testo instruments daily, ensuring that a fresh battery is always available when needed. Investing in these LR44 batteries guarantees that your measurements remain accurate and your devices function without interruption.