I switched the polarization in my battery connection for my Morserino by clipping the leads and soldering them back on in reverse, black on red, red on black. After releasing a video of this, several people left comments indicating I could have just removed the Molex pins and reversed them. This would have been much simpler.
This is the battery I purchased:
https://www.ebay.com/itm/193825796773?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Ruw6B9AbRRm&sssrc=2047675&ssuid=sAgZt_RCQXG&widget_ver=artemis&media=COPY
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