button cell (Q1361661)
small, flat, circular single-cell battery
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other details
aliases button battery
 coin cell
 coin battery
 watch battery
 CMOS battery
 coin cell battery
 hearing-aid battery
description small, flat, circular single-cell battery

External Links
(P604) 2345178
(P646) /m/0ctbfd
(P2581) 03267426n
(P6366) 2910900197
(P10690) 1092