Omron HR-310 User Manual

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BATTERIES
The watch uses a CR2032 3V battery, which has already been installed. 
The battery warnings are:
DESCRIPTION
Continuous fl ashing
The watch battery is low
Intermittent fl ashing
The watch battery is too low to run the 
backlight
*
 The batteries typically last one year.
 
To assure the water resistance take the watch to a local jewelry store 
for battery replacement. Improper replacement will void the warranty.
IMPORTANT:
Remember to set the profi les after every battery replacement or reset.