The Panasonic LR44 is a reliable alkaline manganese button cell battery designed to power a wide variety of compact electronics. With a voltage of 1.5V and a capacity of approximately 150 mAh, this small power source is commonly used in devices like calculators, laser pointers, digital calipers, and various children's toys. Measuring 11.6 mm in diameter and 5.4 mm in height, it fits perfectly into slots designed for AG13, A76, or L1154 equivalents. Each battery is made in Japan and weighs about 1.95 g, providing a lightweight yet steady energy supply for your small handheld gadgets.