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Panasonic lithium backup battery made in Japan for the E-mu Proteus 3.
This lithium battery is manufactured in Japan by Panasonic, ensuring consistent performance and extended service life.
It mounts firmly on the Proteus 3 PCB with solder pins.
Its 3 V voltage with very low self-discharge keeps sound banks and presets safely stored when powered off.
Replacement requires soldering and a memory backup.