Step 1 - Series FirstStep 2 - Parallel Each Series SetQuick Vocabulary ReferenceFirst, we recommend putting each set in series first. To do this, you will use a jumper between the inner positive and negative terminals of each set to increase the voltage, as seen in the picture below:See more on batterystuff instructables
DIY Lithium LiFePo4 12v 18 Amp Battery - Instructables
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Now cut down the Nickle plated strip tape at the Right Length First, make a pair of 3 parallel battery as shown in the picture and then connect all the 4 pair in series This connection is
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