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GCM Battery Replacement
iSTAR Ultra Installation and Configuration Guide 8–7
GCM Battery Replacement
The GCM coin cell battery should be tested annually and replaced as necessary.

The battery is a CR2032 Lithium 230 mA/h coin cell.

The battery retains power for the Real Time Clock for at least 3 weeks. After three weeks
of accumulated power outage, the battery should be replaced.
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The battery should last 5 years if there’s no power outages.
To Remove and Replace the Battery
1. With a small screwdriver, gently pry the battery up at point A .
2. At the same time, use your thumb to push the black tab back B .
3. Gently slide the battery to the left and out.
4. To replace, slide the battery in from the left, under the black tab and under the metal
spring C .
Figure 8-2: GCM Lithium Battery Replacement

Caution - Do not bend or break the metal spring C . The spring is important to the operation of
the battery.
A
B
C