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    Philips Support

    Why do I need battery(ies) for my Philips clock?

    Published on 2017-02-28

    The batteries are used for backing up the memory for time and alarm settings in case of a power failure. The mains supply supports other features of the device.

    Note: Batteries are not supplied with the product. Please consult the user manual for battery type.

    The information on this page applies to the following models: AJ3910/37 , AJ3977/37 .

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