LG LGMS769 - Manual (Page 78)

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Ambient Temperatures
Max: +55°C (discharging), +45°C (charging)
Min: -10°C
Battery Standby and Talk Time
Standby and talk times will vary depending on phone usage patterns and
conditions. Battery power consumption depends on factors such as network
configuration, signal strength, operating temperature, features selected,
frequency of calls, and voice, data, and other application usage patterns.
Technical data