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

 

CAUTION

between battery and the module, and manufacturing tolerances

LZT 123 1834

46