The Energizer 189BP2 is a 1.5V alkaline button cell battery supplied in a convenient twin pack, sold under the common designations LR54, LR1130, and AG10. Measuring just 11.6mm in diameter and 3.1mm in height, this compact coin cell delivers a nominal capacity of up to 80mAh - making it a reliable power source for a wide range of compact electronics including watches, calculators, camera accessories, thermometers, remote controls, and medical devices. Energizer's alkaline chemistry provides stable voltage output and minimises the risk of leakage, ensuring consistent performance throughout the life of the battery. Backed by a shelf life of up to 2 years, this twin pack is a practical choice to keep on hand whenever a replacement is needed.