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TDFreak
Florida Fan
Baton Rouge
Member since Dec 2009
3435 posts

Laptop Battery Best Practice: Always Plugged or Unplugged?
So with phone batteries, the experts tell you to run your phone battery down to zero percent before recharging as that will get you the longest life out of your battery.

What about laptops? Should I only charge my laptop when the battery gets low? It is 100% now, should I unplug it until its down below 20%, and then recharge it to get optimal battery life?

TIA


Korkstand
LSU Fan
Plaquemine, LA
Member since Nov 2003
16413 posts

re: Laptop Battery Best Practice: Always Plugged or Unplugged?
quote:

So with phone batteries, the experts tell you to run your phone battery down to zero percent before recharging as that will get you the longest life out of your battery.
Not sure what experts you're talking about, but I don't think this has been true for a very long time. More than a decade, at least.

Modern charging circuits actually never top off your battery, nor do they let them run completely dead. "100%" is usually somewhere around 85-90% of the battery's actual capacity, and "0%" is somewhere around 10-15%. Lithium batteries last longest when they are kept near the middle of their capacity. I doubt you could extend the battery's life by keeping an eye on the charge much more than the charge circuit already does for you. It's just not worth the time and effort.


Ace Midnight
LSU Fan
Between sanity and madness
Member since Dec 2006
69572 posts
 Online 

re: Laptop Battery Best Practice: Always Plugged or Unplugged?
You should charge portable devices in the 35% to 85% range. I think laptops are okay being plugged in "mostly" but, again, YMMV.


Hu_Flung_Pu
USA Fan
Central, LA
Member since Jan 2013
18730 posts

re: Laptop Battery Best Practice: Always Plugged or Unplugged?
This


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dakarx
Army Fan
Member since Sep 2018
723 posts
 Online 

re: Laptop Battery Best Practice: Always Plugged or Unplugged?
Charging circuits and batteries in Laptops in general using Litium-ion type batteries are designed to remain plugged in pretty much indefinitely. It should not matter if docked or undocked (sometimes called a port replicator).


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notsince98
Missouri Fan
KC, MO
Member since Oct 2012
10907 posts

re: Laptop Battery Best Practice: Always Plugged or Unplugged?
quote:

So with phone batteries, the experts tell you to run your phone battery down to zero percent before recharging as that will get you the longest life out of your battery.


That is absolutely not true for lithium ion batteries. Getting the most out of lithium ion batteries is complicated as essentially everything but sitting at a 40% charge reduces the lifetime.

The worst things for lithium batteries are deep discharge (below 25-30% remaining) and sitting on a charger. The float voltage keeps the battery hot and shortens the life.

For a lithium ion phone, if you want the battery to degrade as little as possible, keeping the battery charged between 30% and 60% are good practices. Don't charge it over 60% and don't let it discharge below 30%.


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lsu480
LSU Fan
Downtown Scottsdale
Member since Oct 2007
91053 posts
 Online 

re: Laptop Battery Best Practice: Always Plugged or Unplugged?
Plugged, always plugged


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