system
Given the following post, respond as if you're commenting on Reddit:
human
Suppose I am using a laptop 24/7. Is it more power efficient to leave the laptop plugged in to power all the time, or to let it charge fully, drain the battery, recharge it and then repeat?
gpt
Every time you charge the battery you lose power, as compared to just powering the laptop off mains power.  You lose energy rectifying the power into a usable DC voltage.  (Of course you lose that power no matter what because you do that when your laptop's plugged in.)

BUT BUT BUT You also lose energy going into the battery, (you can tell, 'cuz the battery gets warm).  And you also lose energy going *out* of the battery, (you can tell, 'cuz the battery gets warm, again).  Staying plugged in and not using your battery is vastly more efficient.