The LR621 is a Alkaline battery of 6.8 mm × 2.1 mm rated 1.5V, with a capacity of 18 mAh — related searches include coin cell · coin battery · 3V.
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.
