VDO M1WL - Manual (Page 22)

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M1 WL
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oPEN cLoSE
oLD NEW
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Replacing the battery in the speed transmitter
The battery in the speed transmitter should be replaced
annually to guarantee seamless wireless transmission.
You need a 3 V 2032 battery.
We recommend using a branded battery from Sony,
Panasonic, Varta or Duracell.
The process is as follows:
STEP 1
Use a coin to remove the battery compartment cover.
STEP 2
Remove the dead battery.
ATTENTION: Wait for 10 seconds before inserting the new
battery. The electronics need this time to recognise that the
battery is being changed.
STEP 3
Insert the battery into the transmitter housing
with the +pole up.
Ensure that the battery is not tilted.
Ensure that the rubber seal lies smoothly on the lid of the
battery compartment.
STEP 4
Insert the battery compartment cover into the opening and
use a coin to turn it to right as far as it will go.