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OmniTouch™ 8128 SE WLAN Handset
13. 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-Polymer batteries at high temperature dramatically reduces its
capacity. For example storage around maximum temperature reduces capacity with
20% in less than a month, permanently.
• When extended battery lifetime is needed, set the handset screen saver to the
"Black also in call" option. See
• The battery lifetime and the speech time are highly dependant on which power save
mode that is used. It is recommended that U-APSD is used to achieve optimal
battery lifetime. Other parameters that can affect the power consumption are
Beacon period and DTIM. Location in the system will also affect the speech time.
For more details, see the document System Planning.
• The handset can be configured to switch off when placed in the charger. When
removed from the charger the handset switches on automatically. See
• 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.