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High-quality Japanese lithium backup battery, designed for the Proteus 1 module.
This original Panasonic lithium battery is made in Japan, offering trusted performance and durability.
It fits securely on the Proteus 1 circuit board with solder pins.
Its stable 3 V output and very low self-discharge allow user presets and sound banks to remain stored even after long periods without power.
Replacement requires soldering and saving user data before installation.