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The manufacturer designed a battery back up. You can open the compartment. Follow the manufacturer instructions. The compartment door is stiff. It may not power up the time but the alarm will supposedly go off at the set time if you have installed 2 good batteries correctly.
Sorry, there was a problem. Please try again later.Yes; there is a place for two AA batteries on the bottom of the unit. It's a bit tricky, but it can be opened.
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