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What about measure the voltage of each node with respect to ground? It will take some processing cycles to convert them into voltage per battery, but it should turn out cheaper. Use some MOSFET type optoisolators to switch the data acquisition device from node to node. Add some series resistors to prevent accidental short circuits.
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If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...
Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
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