-Amazon sells 12V 12Ah gel cells for about $30, such as ExpertPower EXP12120
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-add 8-position DIP switch to select bank 1-8. if all switches off, firmware
-will take over and use value in flash (allows for high bank numbers)
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-add more mounting holes so board doesn't flex when changing spade terminals
+need to move DIP switch away from mounting hole, actual switch is larger than
+the current silksreen rectangle and makes putting that nut on nearly impossible