How to Make Your Mac Lifestyle Green



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Actually, you don't want to unplug once your laptop is past fully charged, if you don't have to unplug it.

Once fully charged, the laptop bypasses the battery, drawing power from the outlet/powersupply. Your laptop uses less energy when powered from the outlet/powersupply, as it takes more energy to power up that battery than you'll pull out (due to inefficiencies in the battery).

If you continually plug, unplug, plug, unplug, using the battery's charge then recharging, you're wasting the energy it took to charge the battery.

Just stay plugged in.



Besides actually using more electricity rather than saving it as pointed out above, unnecessarily discharging and charging your battery will reduce its usable lifetime.  Rechargeable battery lifetime is limited by the number of charging cycles the battery will support; each cycle slightly reduces the capacity of the battery.  Yes, Apple recommends periodically discharging your Li-Ion battery to condition it, but that's only needed about once a month.  Wearing out your battery sooner than necessary isn't exactly environmentally friendly.  MacLife is a trusted source for its readers, some of whom will surely follow this ill-conceived "tip".  How about a bit of fact checking, guys?



It can also be beneficial to remove the battery from the computer too. But if you are going to go weeks without using the battery discharge it to around 40% first as that is the optimal level for Lithium Ion batteries to be stored at so they don't develop a memory in storage. That's why you see batteries from the factory not full charged. Though they also do it for safety now.

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