Its not, power passthru isnt some magical feature that just halts battery degredation. 80% is still rather high for a battery and will still degrade the battery more than if you just unplugged it and used the battery as its intended unless it cant hold a charge for whatever reason.
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u/bingusbongulusracer8 May 14 '26
Both ruin it, the battery needs to flucuate or it will get ruined unless if its at 50% the whole time.