Battery life and its accuracy vary depending on the type of your watch. Check the case back of your watch to identify the type of watch.
Type of watch: The first four digits of the caliber number of your watch (Ex.8J81 - 0000)
Cal. NO |
Battery (SB-) |
Battery Life |
Loss/Gain |
---|---|---|---|
1E70 |
AB |
Approx. 2 years |
±15 secs. per month |
2F70 |
AB |
Approx. 2 years |
±15 secs. per month |
2J80 |
A6 |
Approx. 2 years |
±10 secs. per year |
2J81 |
A6 |
Approx. 2 years |
±10 secs. per year |
4J80 |
AR |
Approx. 2 years |
±10 secs. per year |
4J81 |
AR |
Approx. 2 years |
±10 secs. per year |
4J85 |
AF |
Approx. 2 years |
±10 secs. per year |
4N70 |
AR |
Approx. 3 years |
±15 secs. per month |
5A70 |
AB |
Approx. 2 years |
±15 secs. per month |
5A74 |
AB |
Approx. 2 years |
±15 secs. per month |
7371 |
AF |
Approx. 2 years |
±15 secs. per month |
8J80 |
AJ |
Approx. 3 years |
±10 secs. per year |
8J81 |
AJ |
Approx. 3 years |
±10 secs. per year |
8J82 |
AJ |
Approx. 3 years |
±10 secs. per year |
8J86 |
AJ |
Approx. 3 years |
±10 secs. per year |
8N70 |
AT |
Approx. 3 years |
±15 secs. per month |
8N81 |
AT |
Approx. 3 years |
±10 secs. per year |
9581 |
AJ |
Approx. 3 years |
±10 secs. per year |
The battery life is the estimated life for a watch with a new battery installed. The battery in your watch at the time of purchase was inserted in the watch at the factory for performance checks. It may run down earlier than the above-specified period.
When the battery nears its end, the seconds hand moves at two-second intervals instead of normal one-second intervals. The watch remains accurate while the seconds hand is moving at two-second intervals.
The accuracy is under the condition that the watch is worn on the wrist in a normal temperature range between 5°C and 35°C.
Loss/Gain is determined per year; i.e., each month does not lose/gain the
same number of seconds
(e.g. One month = 2 secs., another month = 1sec., etc).
Operational temperature range is -10°C~+60°C (14°F~140°F).