128 Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Chapter 10 Maintain the Battery
Check If the Battery Is Low
The battery indicator (BAT) warns when the battery is low. Once the controller
is powered down, the battery retains controller memory as long as the BAT
indicator remains on. Temperature dictates how long the BAT indicator
remains on.
Figure 24 - Battery Status Indicator
Estimate 1769-BA
Battery Life
Certain conditions affect typical battery life.
Table 31 - BAT Indicator Duration
Temperature Duration
60 °C (140 °F) 8 days
25 °C (77 °F) 25 days
Table 32 - Battery Life Estimations
Time On/Off At 25 °C (77 °F) At 40 °C (104 °F) At 60 °C (140 °F)
Always on 14 months 12 months 9 months
On 8 hours per day
5 days per week
18 months 15 months 12 months
On 16 hours per day
5 days per week
26 months 22 months 16 months
Always On There is almost no drain on the battery when the controller is always on.
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