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3V lithium battery used for internal...
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3V lithium battery used for internal memory backup in the Roland RA 800 arranger module.
This 3V Panasonic lithium battery is used to maintain the internal memory of the Roland RA 800, allowing user settings, styles, and system data to remain stored when the unit is powered off.
This format matches the original installation used by Roland.
Battery replacement involves soldering and should be carried out by a qualified technician.