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Re:Ask HN: Should I unplug my laptop charger at 100%? by SmellyGeekBoy on Tuesday May 05, 2015 @04:49AM (#9491484)
My ThinkPad E530 (1 year old) has this, it's part of Lenovo Power Manager. Again, only on Windows (it doesn't charge at all in Ubuntu, which I've never managed to get to the bottom of)

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