If my power goes out, will my Lifetone HL Bedside Fire Alarm and Clock work?
Yes, if the installed smoke alarm system has battery back-up and is working the Lifetone HL Bedside Fire Alarm and Clock itself will have seven day battery backup if the required four alkaline D cell batteries have been installed in the product. So if you have ensured battery back up capability for both the installed smoke alarm system and your Lifetone product, even if your power goes out, the Lifetone product will continue to function for emergency alarming purposes for at least seven days. However, the built-in wake-up alarm will only work for the first 24 hours of those 7 days.