Environmental Temperature
2. Battery capacity is highly affected by temperature—the lower the temperature, the lower the battery capacity.
Signal Strength
When the device is in an area with low network coverage, it may take longer to establish a network connection, which results in additional power consumption.
Similarly, when the device is in an area with weak GPS signal, it may take longer to receive satellite data, leading to extra power consumption.
The battery life results are based on the device taking 80 seconds to complete startup, positioning, network registration, and successfully sending a message.