Submitted by OneGuyJeff t3_1274d8q in explainlikeimfive
fox-mcleod t1_jeet2tq wrote
Reply to comment by TheBestMePlausible in eli5: Why do seemingly all battery powered electronics need at least 2 batteries? by OneGuyJeff
Because having half of increments is useful. We might want 4.5 volts.
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