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6mm black on yellow, and 12mm black on yellow: https://www.aliexpress.com/item/1005001839632629.html?spm=a2g0s.9042311.0.0.6ad64c4diC1FFP
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An image of the labels applied to the battery module wiring test jig. This is using the MEDIUM text size on the label maker.
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The label maker by default adds a couple centimeters to the length of the label before and after the text is printed. This is a waste of the heat shrink cartridge. We can eliminate this space by printing a very long label with multiple wire names on it (put 2 spaces between each wire name) and then cut then apart after printing it out.
References:
These 2 videos on the Voltlog youtube channel were helpful in figuring this out. Screenshot above from the 2nd video link.
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