Timex Intelligent Quartz Instructions Manual page 39

BATTERY LEVEL DETECTION
The watch determines the battery level status and
provides the user with a visual indication corresponding
to the current battery level. The battery level status is
classified as Normal Level, Battery Low Level, and Replace
Battery Level, with each level indicated by the movement
of the second hand.
For the Normal Level status, the second hand shall move one
hand position every one second, which is its normal operation.
When the watch is in Battery Low Level status, the second
hand shall only move at 2-second intervals and shall
move by two hand positions. It is recommended that the
user replace the battery when the watch is at Battery Low
Level status.
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When the watch is in Replace Battery Level status, the
second hand shall only move at 5-second intervals and
shall move by five hand positions. At this point, depth
sensor cannot be activated, and the user must replace
the battery immediately.
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