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How do you care for a li-ion laptop battery?

post #1 of 10
Thread Starter 
I think a guide on this would make a great sticky.

Now that i am getting into photography, i got my self my first real laptop.
I have been wondering how to care for my battery to get the most life out of it.

With today's tech i assume that all batteries in laptops and phones are Li-ion batteries.

What is the proper way to care for these batteries?
I see a bunch of different advice, but often it is an older post and not specific to the type of battery, so it is a bit confusing on how to care for them.

Do i always want to use my charger with my battery at home keeping the battery at 100% charge?
Do i remove my battery at home and just use the power cord?
Do i just use the battery and run it down to 40-50% then plug in the laptop to 100% or do i run the battery dead?
Can i leave the laptop plugged in and turned off even if the battery is at 100%?
when i first get the laptop or device to i want to fully discharge the battery then fully charge it?
Should i cycle the batter every couple of months (discharge to 0% than recharge to 100%)?

I see there is somewhat of a guide here:
http://www.overclock.net/t/942774/giz-how-to-take-care-of-your-li-ion-battery

Here is an interesting question asked in the thread:
Rebelord says:Aren't new or newer 'type' of batter chargers, specifically laptop ones supposed to be 'Smart'; in that they stop charging once the circuit deems its at 100% capacity? (i asked this above but with different wording).

Half_Duplex says:
Here's a tip a really smart person gave me a while back:

STAY INSIDE THE 20's.

Charge to 80% or so, unplug it and use it to 20% or so, repeat. Charging to full is fine if you're not using it.

Me and my sister have had identical MacBooks purchased around the same time, I follow the rule, she doesn't pay attention, she's had to replace her battery while mine is as good as the day I got it.

Follow that simple rule as much as you can and you should get as much use from your Li-Ion as possible.
*Beers says that that advice is bad.*

Or if need be, is the thread posted in the "hardware news" forum, something that should be posted here also?

EDIT:
HW Monitor shows the wear on your laptops battery. I assume it will show this for at least newer laptops.
http://www.cpuid.com/softwares/hwmonitor.html
Edited by micro5797 - 1/4/12 at 11:01am
post #2 of 10

My laptop is plugged in 95% of the time that it's on. About two times a week I'll use it on battery power for an hour or two out of necessity (such as sitting on the couch and not wanting to get up to plug it in and have it stretch halfway across the room, or eating in the kitchen with it). Since it doesn't go all the way down to 0%, I don't want the battery's memory to get all funky, so I discharge it completely about twice a month. I still have a 3.5 hour battery life with my usage/screen brightness on it, and hasn't degraded any in the 7 months I've had it.

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post #3 of 10
On my third laptop and have had the most success with the "If the laptop is plugged in and battery doesn't need to be charged, take the battery out."

I almost exclusively use my laptop plugged in with the battery removed, but do try to fully use up the battery every once in a while, when I was still in school I would use battery power while in class, fully charge when I got home, and then removed the battery. My Dell, which I never removed the battery, went through two batteries in 2 years. My current ASUS, which I use as stated above, is 2.5 years old and the original battery can still hold a charge. Not as long as when I first bought it, but only down to about two hours, from 2 and a half at my performance/brightness settings.
post #4 of 10
Plug it in whenever I feel like it, resell the laptop to some sucker after 12 months for $300 less than I paid and get a new one. (15" mbpro)
 
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post #5 of 10

http://batterycare.net/en/guide.html

 

Apparently all the myths are debunked... Good read, I learned something.

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post #6 of 10
Thread Starter 
Quote:
Originally Posted by metallicamaster3 View Post

http://batterycare.net/en/guide.html

Apparently all the myths are debunked... Good read, I learned something.

Good read, thanks!
The only thing that i knew for sure was that a li-ion battery did not get a memory, i was unaware that you should not fully discharge the battery.
post #7 of 10
Yea I been telling people for years that batteries do not have memory because we are done with ni-cad. What I really enjoy with my laptop is that they have a best battery health option that will only charge the battery to 45-50% and leave it there when plugged in. It is currently sitting at 49% and will stay there even when I turn it off, it will not charge it.
   
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post #8 of 10
Quote:
Originally Posted by Wildcard36qs View Post

Yea I been telling people for years that batteries do not have memory because we are done with ni-cad. What I really enjoy with my laptop is that they have a best battery health option that will only charge the battery to 45-50% and leave it there when plugged in. It is currently sitting at 49% and will stay there even when I turn it off, it will not charge it.


 

I'd like in on that! 

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post #9 of 10
Yea this is with Lenovo's energy management so...not sure if that would work lol. But man it is sweet. I think I charged my battery 100% only once since I've owned it. I am almost always plugged in and so I always keep it on best battery health vs. best battery runtime. Even at 50% charge, I still get nearly 3 hours of battery. It's insane how much tech has advanced.
   
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post #10 of 10
Lenovo and Sony laptops have such an option to cap battery charging to 50/80% (Lenovo can set it to whatever the user wants, iirc).
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