Sony Ericsson GS64 - Manual (Page 42)

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Example 3 – Typical Operation:
A module performing periodic network data transfers and communicating intervallic
status information to its host would spend its non-active periods in sleep mode. If
the module spends 30 mins each day on call (320mA), 30 second each hour
performing housekeeping, monitoring and status tasks (110mA), and sleeps (2.1mA)
during the intervening periods, an 1800mAh rated Li-Ion battery fully charged would
typically provide
1800*0.95/([0.5hr*320]+[0.2hr*110]+[23.3hr*2.1]) = 7 days 6 hrs operation
The above examples are given for guidance, the actual battery life will
depend upon variables such as battery condition, number of previous
charge/discharge cycles, operating temperature, series resistance
between battery and the module, and manufacturing tolerances
CAUTION