Roland SH-4d Owner's Manual page 14

Turning the Power On
If you handle the battery improperly, you risk explosion and fluid leakage. Make sure that you carefully observe all of the
items related to batteries that are listed in the "USING THE UNIT SAFELY" and "IMPORTANT NOTES" ("USING THE UNIT
SAFELY") leaflets for proper use.
Battery replacement indicator
When the batteries have run down, the message "Battery Low!" appears on the screen.
When this occurs, install new batteries.
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