Suzuki DF115BG 2021 Owner's Manual page 21

To replace the keyless fob battery:
1. Insert a flat blade screwdriver in the slot of
the keyless fob and remove the cover.
2. Remove the O-ring 1.
NOTE:
The O-ring may be fitted on the cover side.
NOTICE
If the O-ring is damaged, the waterproof per-
formance deteriorates, which can cause the
keyless fob to malfunction.
Be careful not to damage the O-ring when
removing it.
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3. Insert a flat blade screwdriver into the slot at
the mark on the cover to remove the bat-
tery.
4. Replace the battery so its + terminal faces
the cover side as shown in the illustration.
Lithium disc type battery: CR2025 or equiva-
lent.
Confirm that the O-ring is placed in position
on the body side.
5. Reinstall the cover.