Owner's manual

3. Storage & Maintenance
The unit contains no user-serviceable parts. If the battery service life (3~5
years at 25°C ambient temperature) has been exceeded, the batteries
must be replaced. In this case, please contact your dealer.
Storage
Before storing, charge the unit 4 hours. Store the unit covered and upright
in a cool, dry location. During storage, recharge the battery in accordance
with the following table:
Storage Temperature Recharge Frequency Charging Duration
-25°C - 40°C Every 3 months 1-2 hours
40°C - 45°C Every 2 months 1-2 hours
Be sure to deliver the spent battery to a recycling facility or ship it to
your dealer in the replacement battery packing material.