Watch Battery Identification:
321, V321, D321, GP321, SR65SW, SR616SW, 280-73, GP21, SB-AF, SB-DF, TR616SW, DA, 540, 611, RW321, CX616, DPV
System: Silver Oxide
Voltage: 1.55 Volt
Capacity approx: 15 mAh
Chemical: Low-Drain, LD
Dimensions in mm: Ø 6.80 x 1.65