Batteries that are equivalent to 392 watch batteries include those marked with LR- or SR-41, LR- or SR-736, and AG-3 designations. Other equivalents are SG3, G3-A, 192 and 384 batteries. These batteries generally fall under the button-type or button cell category.
Button cell batteries are typically smaller in diameter but greater in height than coin cell batteries. The 392 batteries and their equivalents measure 7.9 millimeters in diameter and 3.6 millimeters in height. Mercury batteries of this type were once common but manufacturers discontinued the use of mercury and replaced them with alkaline, lithium and silver oxide batteries. These batteries are commonly used in watches and camera equipment.