Equivalent: Energizer 399, Maxell SR727W, Varta V399, Rayovac 399, Duracell D395/399, Timex W, Citizen 280-44, Seiko SB-BP, I.E.C SR927 (SR57)Features:

• Chemistry: Silver Oxide
• Voltage: 1.55V
• Battery size: 399
• Capacity: 55 mAh
• Diameter: .37" 9.5 mm
• Height: .10" 2.7 mm