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7.2. REPLACING THE BATTERY
Your Suunto M3 operates on a 3-Volt lithium cell, type: CR 2032.
A low-battery warning indicator is activated on the display when approximately 5–15
percent of the battery capacity is still available. When this occurs, you should replace
the battery. However, extremely cold weather may activate the low battery-warning
indicator even when the battery is still fully operational. If the battery-warning indicator
is activated in temperatures above 10°C (50°F), replace the battery.
NOTE: Heavy use of the backlight will significantly reduce battery life.
You can replace the batteries yourself as long as you do it properly to avoid any
leakage of water into the battery compartment or computer. Always use original
battery replacement kits that include a new battery, battery lid, opening tool and O-
ring. You can purchase the battery kits from official Suunto retailers.
NOTE: Change the battery at your own risk and use the original Suunto
battery replacement kit. Suunto recommends you to have the batteries
changed in official Suunto services.
NOTE: When replacing the battery, also replace the battery lid and O-ring. Never use
the old ones.