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when the power level is too low.
1. If you use the battery at a persistently low charge, it may
adversely affect the battery life and quality.
2. Use only the charger approved by the manufacturer for proper
operation.
3. Do not remove the battery during charging.
4. Fill the unit for at least 4 hours before first use. This can increase
the efficiency of the multiple charge and discharge cycles.
4.6. Maintaining the battery
The device has a rechargeable battery. When not using the charger,
disconnect it from the power source. For more than a week, do
not leave the phone charging. Temperature influences battery
capacity. Battery may need to be cooled or warmed up before
charging. If the battery temperature is lower than 0 ° C or higher
than 45 ° C, do not charge the battery. Use the battery according
to its intended purpose. Do not short-circuit the battery terminals.
Do not use a damaged battery. If you are using an appliance under
extreme temperature conditions, the battery will not work
properly and its life span will be reduced. DO NOT throw the
battery into fire, follow local laws and regulations regarding the
disposal of the spent battery.
5. Power on/off
Press and hold the End / On-Off button to turn the unit on or off.
1. If a SIM card is not inserted, it is defective or not fit correctly, a
warning message will be displayed after switching on the display.
Turn off your device and make sure the SIM card is inserted
correctly.
2. If you insert the SIM card into the device, the PIN request and
the phone password are active, the device prompts you for the
password and PIN code and switches to standby mode.
After switching on, the phone automatically searches for the
