LifeTrak The Core C200 - Manual (Page 11)

Battery replacement will be required from time to time, and
should occur when:
• The display fades in part or completely
• The Heart Rate function will not activate
The battery life will vary depending on usage.
We recommend battery replacement be done by a watch
repair service center to ensure the water seals are not
compromised during the process.
Your C200 uses one (1) standard lithium replacement
battery: CR2032
BATTERY
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