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| andtech support |
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| Frequently Asked Questions |
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Alarm Related
TV / HDTV Related
Changing Alarm Batteries
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| Battery Replacement Instructions |
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Temperature Sensor & Flood Detector
Ademco 5821
Important Notes
- Use 3-volt lithium battery: Duracell DL 123A or Panasonic CR123A.
- Observe Polarity
- When replacing the battery, wait at least 30 seconds after removing the old battery,
before installing the new one.
1. Remove the transmitter's top cover by inserting the flat blade of a small screwdriver
into the pry-off slot at one end of the unit (see Figure 1 for location), and slightly
twisting the blade until the cover disengages.
2. Install a 3-volt lithium battery as shown in Figure 1.
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