This. I can’t imagine even the cheapest POS phone benefitting from this. About the only use I could see is if you have a device that you normally leave on the charger for extended periods (weeks at a time) this would help avoid the battery getting damaged from being effectively stored at full charge (which can shorten the lifespan), assuming it actually shuts off the charging long enough to let the battery run down by the required 5 to 10% before the charging circuit kicks back on.
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