321/ SR616SW
Maxell Watch Battery SR616SW is a silver oxide low drain battery 1.55 V. Watch Battery SR616SW measures 6.8 x 1.6 mm. This battery is mercury free and has a capacity of 14.5 mAh.
Interchange: Energizer 321, Renata 321, Maxell SR616SW, Varta V321, Rayovac 321, Timex DA, Citizen 280-73, Seiko SB-AF/DF, I.E.C SR616 (SR65)