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GUIDELINE FOR HEADPHONE AND
EARPHONE USAGE
To prevent possible hearing damage, please do not listen
at high volume levels for long periods.
SAFETY AND REGULATORY INFORMATION
STORING YOUR PHONE OR BATTERY
If you plan to store your phone or your battery for an
extended time, please follow the recommendations
below to ensure long battery life and minimize battery
self-discharge:
• Charge your battery to a level between 40% to 80%
• Store phone and battery separately to minimize
battery trickle drain
• Insulate the battery terminals to avoid discoloration
and potential shirt circuits with other battery
terminals
• Store the battery in dry and cool conditions in a
vibration-free environment
• If you use a climate-controlled storage location, set
the temperature to 50° to 64° F (10° - 18° Celsius)
and keep the relative humidity between 40% - 50%
• Recharge the battery once every 6 months, using
the original Sonim wall charger and charging cable
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