The 371 (SR920SW) is a Silver Oxide battery of 9.5 mm × 2.1 mm rated 1.55V, with a capacity of 38 mAh — related searches include SR920SW · watch · cross reference.
It follows the IEC designations of its size class and is covered by our EU battery information portal declaration under Regulation (EU) 2023/1542.
For your device, match the exact size and voltage printed on the old cell — our engineers confirm the reference and can send samples.
