The 392/SR41SW GP B1 with Battery is a coin-style alkaline battery manufactured by GP Batteries. It measures 16.8mm in diameter and 3.6mm in thickness, and is silver in color. It has a 1.55 Volt voltage output, and its battery number is 1. The battery type is LR41, or R736, or SR41, and it is an alkaline manganese dioxide battery.