ENERGY EFFICIENCY
Recommendations on how to save energy:
• Do not charge a battery when the ambient room temperature is above +40° C or below
+5° C (above 104° F or below 41° F). Charging below +5° C will harm the battery and
shorten the lifetime.
• Note that storing Li-Ion batteries at high temperature dramatically reduces its capacity. For
example storage around +60° C reduces capacity with 20% in less than a month,
permanently.
• Set the handset screen saver to the "Black also in call" option. The screen goes black and
the backlight is turned off. In addition, the backlight is turned off when the handset is in call.
This helps extend battery life especially when the user is on an extended call. See Screen
Saver on page 36.
• The handset can be configured to switch off when placed in the charger. When removed
from the charger the handset switches on automatically. See Switch off While Charging on
page 40.
• If the charger will not be used for a longer period of time, remove the power adapter to the
charger.
• Do not put the handset in charger if no charging is needed.
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