氧化银电池，又称银锌电池或锌-氧化银电池，是以银的氧化物作正极、锌作负极、碱性溶液作电解质的一种电池。既可做成一次电池，也可做成蓄电池，但两者的其他辅助成分与制造方式有些不同。它具有放电平稳、较高的能量与重量比等优点，但因为银的成本较高，一般以作成纽扣电池为主，或用在一些要求较高、又能承受此高成本的特定场合，例如某些鱼雷或潜水艇。

常见氧化银电池的型号中，开头一般是 SR ，这是由 IEC 所制订的标准编码，其中 S 代表氧化银电池，R 代表圆型(包括圆筒型)。

A silver-oxide battery (IEC code: S) is a primary cell with a very high energy/weight ratio. Available either in small sizes as button cells (where the amount of silver used is minimal and not a significant contributor to the product cost), or in large custom designed batteries where the superior performance of the silver-oxide chemistry outweighs cost considerations. These larger cells are mostly found in applications for the military, for example in Mark 37 torpedoes or on Alfa-class submarines. In recent years they have become important as reserve batteries for manned and unmanned spacecraft. Spent batteries can be processed to recover their silver content.