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Lose radio presets and clock time when the power fails (as it does quite often here). I don’t see any location for back up battery externally or internally. Any ideas?

Donald Bradbury, The manual does state when power outage occurs and last more then 1 minute all settings may be lost. Manual does not state battery back up or show installation of batteries for radio itself. link to your manual below. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. https://docs.sony.com/release/ICFCD553RM