Welcome to the MacNN Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > Battery Strategies

Battery Strategies
Thread Tools
ghporter
Administrator
Join Date: Apr 2001
Location: San Antonio TX USA
Status: Offline
Reply With Quote
Jan 10, 2021, 07:57 PM
 
Apple says you “need to keep the electrons moving” to maximize laptop battery life. Their suggestions don’t seem to be specific enough to address my usage patterns.

I’m thinking, from past experience, that if I leave my machine plugged in when I’m not using it, it will eventually reduce battery capacity - even with the latest generation of Lithium Ion battery.

I have thought that maybe I could connect the charger to a timer. Run it for some length of time that would provide plenty of charge, then turn off so the battery isn’t “always” being charged. This could be set for overnight hours when I’m never using the machine, and not get in the way at all.

Here’s the rub: I don’t have enough current technical knowledge about how either the laptop’s charging system works or how Lithium Ion batteries handle being charged for long periods of time.

While I’m asking this specifically about my 2015 MBP, the question really seems to apply to anything that has a non-user-replaceable battery.

So I’d appreciate anyone’s insight, experiences and helpful suggestions on this topic.

Glenn -----OTR/L, MOT, Tx
     
Spheric Harlot
Clinically Insane
Join Date: Nov 1999
Location: 888500128, C3, 2nd soft.
Status: Offline
Reply With Quote
Jan 11, 2021, 12:36 PM
 
I use battery-powered devices mainly in order to have to worry as little as possible about when and where I use them.

I figure, if I spend all the machine’s life worrying about battery preservation, it might delay the inevitably necessary replacement by a few months. Over a lifespan of five or six years.

I’ve decided that it’s far more useful to just use my machines, rather than arrange myself around them any more than necessary.
     
Thorzdad
Moderator
Join Date: Aug 2001
Location: Nobletucky
Status: Offline
Reply With Quote
Jan 11, 2021, 04:56 PM
 
My rule of thumb has always been: Do not use a set recharging schedule. Vary your recharging schedule as much as possible, i.e. Let the battery get down below 20% before you recharge, then next time recharge when it's only down to 40%. Just keep varying the percentages as much as possible. I've also heard that you shouldn't necessarily charge the battery to 100% each time either.
[set curmudgeon_mode=1
     
andi*pandi
Moderator
Join Date: Jun 2000
Location: inside 128, north of 90
Status: Offline
Reply With Quote
Jan 11, 2021, 09:55 PM
 
I feel like I've been told several conflicting things (don't charge until it's below x%... don't leave it charging all the time... let it fully drain...) so it is confusing knowing which is best.
     
Spheric Harlot
Clinically Insane
Join Date: Nov 1999
Location: 888500128, C3, 2nd soft.
Status: Offline
Reply With Quote
Jan 12, 2021, 05:38 AM
 
Originally Posted by Thorzdad View Post
My rule of thumb has always been: Do not use a set recharging schedule. Vary your recharging schedule as much as possible, i.e. Let the battery get down below 20% before you recharge, then next time recharge when it's only down to 40%. Just keep varying the percentages as much as possible. I've also heard that you shouldn't necessarily charge the battery to 100% each time either.
Apple‘s optimised charging plan appears to disagree.
     
shifuimam
Addicted to MacNN
Join Date: Aug 2006
Location: The deep backwoods of Idaho
Status: Offline
Reply With Quote
Yesterday, 10:54 AM
 
sorry for the necro, just wanted to add:

* Never discharge a lithium ion or polymer battery completely. Doing so risks killing the battery completely and permanently.
* Use the battery from time to time. It seems Apple's batteries are particularly bad about crapping out if you leave them on a charger indefinitely. Other OEMs don't have this problem nearly as much. *shrug*
Sell or send me your vintage Mac things if you don't want them.
     
   
Thread Tools
 
Forum Links
Forum Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Top
Privacy Policy
All times are GMT -4. The time now is 06:41 AM.
All contents of these forums © 1995-2017 MacNN. All rights reserved.
Branding + Design: www.gesamtbild.com
vBulletin v.3.8.8 © 2000-2017, Jelsoft Enterprises Ltd.,