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Prepare circuit board for installation
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Tin the pads
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Apply a small amount of flux to the battery terminal pads. (Photo 1)
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To a clean iron tip, apply a small amount of solder. (Photo 2)
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Place the tip of the tinned iron onto the fluxed pads until a small blob of solder is left on each pad. (Photo 3)
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Use isopropyl alcohol on a q-tip to clean any additional flux left on the board.
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