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by digikata
4027 days ago
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A single cell AA lithium likely already has a 3.7v (IIRC) to 1.5v step down, but also likely has a cut-off voltage to protect the internal cell too. If it's built-in lithium then you're as likely put in a step-down or a buck-boost to regulate raw lithium cell pack voltages to whatever the device needs internally, but that also needs a self-protection cutoff. |
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