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I'm trying to get 12v from two 9v batteries. Using resistors, I managed to get the bottom battery to 3v but when I tried adding them, it resulted in 9v. What am
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Impecca Platinum Series Alkaline 9V Battery (1-Pack) IMP9V B&H
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78 9V batteries in series at 625V. - YouTube
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9 Volt Batteries
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