SIGMA RC 14.11 - Manual (Page 44)

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10 MAINTENANCE AND CLEANING
10.1 ChANGING ThE BATTERY
The running computer uses a CR2032 battery
(ref. no. 00342) and the R3 sensor uses a CR2450
battery (ref. no. 20316).
Prerequisite: You have a new battery and the battery
compartment tool.
1 Use the battery compartment tool to turn the
cover anti-clockwise until the arrow points to
OPEN. Alternatively, you can also use a ballpoint
pen.
2 Remove the cover.
3 Remove the battery.
4 Insert the new battery. The plus sign points
upward.
Important: Ensure the polarity is correct!
5 Replace the cover. The arrow points to OPEN.
6 Use the battery compartment tool to turn the
cover clockwise until the arrow points to ON
(on the R3 transmitter, to Close).
7 Correct the time and date.
Important: Dispose of old batteries properly
(see section 9.4).