User manual

ADDITIONAL BATTERY 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

GUIDELINE FOR HEADPHONE AND

EARPHONE USAGE

To prevent possible hearing damage, please do not listen

at high volume levels for long periods