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A comment on If your iPhone is slow, try replacing the battery. Parent comment

Re:If your iPhone is slow, try replacing the battery by foldr on Sunday December 10, 2017 @07:44AM (#15891164)
LiPo batteries generally supply from 4.2V to 3.7V from a fully charged state to a fully discharged state. Modern CPUs run at under 2V. If the battery was directly connected to the CPU, the CPU would fry.

https://en.m.wikipedia.org/wiki/Buck_converter

That being said, it's conceiveable that a worn out battery might not be able to supply enough power to run the CPU at higher clock speeds.

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Re:If your iPhone is slow, try replacing the battery by gargravarr on Sunday December 10, 2017 @11:22AM (#15892058)
Not to nit-pick, but 3.7v is the nominal cell voltage. They can supply power down to 3.3v safely. Fully discharged is around 3.0v.
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Re:If your iPhone is slow, try replacing the battery by foldr on Sunday December 10, 2017 @11:49AM (#15892198)
Ah yes, thanks for the correction.
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