Maxcom MM720BB, Руководство по эксплуатации

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18. Warranty Terms
The phone has a warranty, an inseparable part of which is
the purchase receipt.
Repairs of phones damaged as a result of misuse,
electrostatic discharges or a lightning, are payable. If the
user attempts to repair or modify, it invalidates the
warranty!
The above is for information purposes.
19. Battery Information
In the telephone there is a battery, which may be
recharged again by means of a charger attached to the
set.
Working time of the phone depends on various operation
conditions. Shorter operation is significantly affected by
how far we are from a transmitter and the duration and
number of calls. When moving, the phone switches on a
current basis between the transmitters, which has also a
strong effect on the working time.
After few hundred charges and discharges the battery
naturally loses its properties. If the user observes
substantial loss of capacity, they should get a new battery.
Use only batteries recommended by the manufacturer. Do
not leave the charger connected for longer than 2-3 days.