Rayovac 388 1.5 volt Silver Oxide Watch Battery

Rayovac 388 1.5 volt Silver Oxide Watch Battery

The original 388 mercury battery is no longer manufactured, so what is offered here is a 329 silver oxide battery supplied with a plastic spacer ring. The plastic ring allows the battery to be fitted into the gap for the 388 battery, however the battery is a silver oxide 1.5V battery whereas the original mercury cell was 1.35v. This might adversely affect some watches as explained on this site (Rayovac Silver Oxide Battery 329 1.5 Volts + ring)

Chemistry: Silver Oxide (non-rechargeable)
Capacity: 39mAh
Height: 3.1mm
Diameter: 7.9mm (increased to 8.8mm by spacer ring)
Voltage: 1.55V
Weight: <1g

Also known as: SSIH 9910, Varta 503, Bulova 211, Mallory 10R10, Accucell-2