Beurer BY 33 - Manual (Page 23)

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• The following other factors can interfere with the baby monitor’s transmis-
sion or shorten its range: covering the units, furniture, walls, houses, trees,
environmental factors (such as fog, rain).
9. Replacing/charging the batteries
If the batteries are too flat, then the units will switch off automatically. The
batteries must then be replaced or recharged (see Initial use).
• When changing the batteries, use batteries of the same type,
make and capacity.
• Always replace all batteries at the same time.
• Use batteries free from heavy metals.
10. Storage and maintenance
The service life of the devices depends on careful use.
Important:
• Remove the batteries from the parent unit if the unit is not in use
for an extended period.
• You will get the maximum capacity from your battery if you run
down the battery at least once every 6 months. To do this, discon-
nect the device from the mains and run the battery down through
normal use. Then fully charge the battery up again.
• The maximum battery capacity can only be reached after it has
been charged several times and is dependent on many factors
(battery state, ambient temperature, means and frequency of
charging, etc.).
• Protect the devices from knocks, damp, dust, chemicals, drastic
changes in temperature, electromagnetic fields and nearby sourc-
es of heat (ovens, heaters).
• If dirty, wipe the device with a soft, dry cloth.