Yamaha FX Nytro FX10D Owner's Manual page 105

Storage
Battery
Remove the battery from the snowmobile.
Store it in a cool, dry place that is above 0 °C
(32 °F), but less than 30 °C (90 °F). Check the
condition of the battery once a month, and
charge it as necessary. NOTICE: Always
keep the battery charged. Storing a dis-
charged battery can cause permanent bat-
tery damage.
[ECS00691]
TIP
Before installing the battery, have a Yamaha
dealer inspect and fully charge it.
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