Getting rid of that huge 6V lead acid battery and using my NP-F960 camera batteries with the Minelab GP-Extreme metal detector. The voltage regulator was adjusted with the onboard potentiometer to output a voltage of 6.8 Volts.

1x F-970 battery plate
1x Step-Down Switching Voltage Regulator D-SUN MP1584EN
1x 6.35mm audio socket

I also added the Fusion 360 file in case you need to modify it for your parts.
More infos to this project on my blog:
https://www.schweinert.com/minelab-gp-extreme-battery-mod/

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