Maxcom MM820 Plus, User Manual, Page: 12 / 77

12
Charging
Never use a charger or a battery which has been
damaged or produced by another manufacturer. Parts of
other type or any modifications may cause damage to the
mobile or constitute a violation of the rules for radio
devices and, consequently, the guarantee loss.
If the battery is low, the display shows an empty battery
symbol and a sound signal is heard (if the alert sound is
on). Connect the charger with the socket to charge the
battery.
The lines on the battery charging indicator will appear
and disappear during the charging process to stop
when the phone is disconnected from charging. The
total battery charging time is around 3 hours.