Our COA1910 carbon monoxide detector is designed for reliable home safety. If you hear a beeping sound after inserting a new battery and briefly see the FAULT light illuminate, this may be related to the type of battery used.
What causes this?
We have found that some batteries—especially budget brands or those with lower peak voltage—do not always provide the required power for optimal detector performance. This can result in periodic beeps and a flashing FAULT light, even though the device is otherwise functioning correctly.
Which batteries do we recommend?
For best performance, we recommend using industrial-grade batteries from well-known brands. These provide stable voltage and have been thoroughly tested with the COA3910. Recommended options include:
- Maxell Alkaline AA
- Varta Industrial Pro AA
- Duracell Industrial AA
No malfunctions or error messages have been observed with these batteries.
Note on alternative batteries
Batteries such as A-Force (sold in discount stores like Action) may in some cases deliver insufficient voltage, causing the symptoms described above. While this does not damage the device, it may lead to confusion and unnecessary alerts.
Tip: To ensure trouble-free operation, always choose high-quality batteries suitable for safety equipment.
If you have any further questions or need advice, we are happy to assist.