Macbook Air charger still lit up green when unplugged? - MacRumors Forums
Register FAQ / Rules Forum Spy Search Today's Posts Mark Forums Read
Go Back   MacRumors Forums > Apple Hardware > Notebooks > MacBook Air

Reply
 
Thread Tools Search this Thread Display Modes
Old Feb 1, 2013, 09:22 PM   #1
missraffix3
macrumors newbie
 
Join Date: Feb 2013
Macbook Air charger still lit up green when unplugged?

So I was just charging my computer and when the battery was full, I removed the charger. However, the charger was still lit up! It even remained lit up for a few seconds when I unplugged the charger from the wall. I have no idea what's going on. Has this ever happened to anyone? Or does anybody know how to fix it so it won't happen again?
missraffix3 is offline   0 Reply With Quote
Old Feb 1, 2013, 09:25 PM   #2
simsaladimbamba
macrumors Core
 
simsaladimbamba's Avatar
 
Join Date: Nov 2010
Location: located
It has happened to me with several chargers, it seems to be a normal behaviour.

PS: Why do you remove the charging cable after the battery has been charged, unless you need the mobility?
__________________
FREEdomly passports. Circumwent bürocrazy.
simsaladimbamba is offline   0 Reply With Quote
Old Feb 1, 2013, 09:29 PM   #3
missraffix3
Thread Starter
macrumors newbie
 
Join Date: Feb 2013
Quote:
Originally Posted by simsaladimbamba View Post
PS: Why do you remove the charging cable after the battery has been charged, unless you need the mobility?
I heard that with lithium ion batteries it's best to keep them going through the cycle of being charged then draining. It keeps them working longer.
missraffix3 is offline   0 Reply With Quote
Old Feb 1, 2013, 09:30 PM   #4
simsaladimbamba
macrumors Core
 
simsaladimbamba's Avatar
 
Join Date: Nov 2010
Location: located
Quote:
Originally Posted by missraffix3 View Post
I heard that with lithium ion batteries it's best to keep them going through the cycle of being charged then draining. It keeps them working longer.
Modern Macs use batteries not bound to that ancient method anymore.
______________________________________________________
This should answer most, if not all, of your battery questions:
Apple Notebook Battery FAQ by GGJstudios
The F.A.Q. includes the following topics:
  • BATTERY INFORMATION
  • BATTERY LIFE FROM A CHARGE
  • AC POWER
  • CALIBRATION
  • BATTERY LIFESPAN
  • CHECKING STATUS AND HEALTH
  • CHARGING
  • WHAT IS A CYCLE?
  • BATTERIES ARE NOT COVERED
  • BULGING OR SWELLING BATTERY


______________________________________________________
__________________
FREEdomly passports. Circumwent bürocrazy.
simsaladimbamba is offline   0 Reply With Quote
Old Feb 1, 2013, 09:32 PM   #5
missraffix3
Thread Starter
macrumors newbie
 
Join Date: Feb 2013
Quote:
Originally Posted by simsaladimbamba View Post
Modern Macs use batteries not bound to that ancient method anymore.
Oh, I didn't know that. Thanks!
missraffix3 is offline   0 Reply With Quote
Old Feb 1, 2013, 09:34 PM   #6
simsaladimbamba
macrumors Core
 
simsaladimbamba's Avatar
 
Join Date: Nov 2010
Location: located
Quote:
Originally Posted by missraffix3 View Post
Oh, I didn't know that. Thanks!
Read the guide I linked to, it should help you understand your battery better and not wear it down unnecessarily.
__________________
FREEdomly passports. Circumwent bürocrazy.
simsaladimbamba is offline   0 Reply With Quote
Old Feb 1, 2013, 09:35 PM   #7
bjm2660
macrumors 6502
 
Join Date: Jun 2011
Location: Virginia
Junk it.
bjm2660 is offline   0 Reply With Quote
Old Feb 1, 2013, 09:41 PM   #8
missraffix3
Thread Starter
macrumors newbie
 
Join Date: Feb 2013
Quote:
Originally Posted by bjm2660 View Post
Junk it.
My computer or charger...? Either one, no thanks. Both are pricy to replace. Plus I'm testing the charger again now and it may have just been a weird fluke.

----------

Quote:
Originally Posted by simsaladimbamba View Post
Read the guide I linked to, it should help you understand your battery better and not wear it down unnecessarily.
Yeah, I read some of it. Like about the 1,000 full charging cycles and how to check my battery status.

----------

Quote:
Originally Posted by simsaladimbamba View Post
Read the guide I linked to, it should help you understand your battery better and not wear it down unnecessarily.
Also, I never let it fully drain before I charge it, just so we're clear. I tend to charge it when it gets to about 25% (red bar) or when the alert pops up.
missraffix3 is offline   0 Reply With Quote
Old Feb 2, 2013, 01:27 AM   #9
burnout8488
macrumors 6502a
 
Join Date: May 2011
Location: Endwell, NY
Quote:
Originally Posted by missraffix3 View Post
I heard that with lithium ion batteries it's best to keep them going through the cycle of being charged then draining. It keeps them working longer.
Girlfriend used to do this, her battery is crap now. 400-500 cycles and most of them were stationary, at a desk. She was unplugging it when charged for no reason because she thought the MacBook would overcharge itself.
__________________
Intel: iMac 4,1 (Flashed to 5,1), 2012 MBA 13" Base
PPC: iMac G4 700
iOS: iPhone 5C 16GB Sprint / iPad 2 - 16GB Verizon
burnout8488 is offline   0 Reply With Quote
Old Feb 2, 2013, 10:07 AM   #10
missraffix3
Thread Starter
macrumors newbie
 
Join Date: Feb 2013
Quote:
Originally Posted by burnout8488 View Post
Girlfriend used to do this, her battery is crap now. 400-500 cycles and most of them were stationary, at a desk. She was unplugging it when charged for no reason because she thought the MacBook would overcharge itself.
That's what I thought too, but like I said, I never let it fully drain to 0% before charging it. So not many full cycles were completed.
missraffix3 is offline   0 Reply With Quote
Old Feb 2, 2013, 04:12 PM   #11
skinny*k
macrumors regular
 
Join Date: Feb 2011
Location: California
@ missraffix3, Is your charger made by Apple, or is it a clone? The green LED means that full power is being delivered, and the non-Apple chargers do not communicate with the MacBook's charging system, so they always deliver full power. The Apple charger adjusts to what the MacBook needs, and only delivers full power when its needed. The Apple charger is better, but an 'always on' green LED on a non-Apple charger is nothing to worry about. If it is an Apple charger, I suggest taking it and your laptop to the Genius Bar to see what's wrong.

@ Everyone, If saving battery cycles means anything to you, it is better to run your MacBooks from the charger whenever you can, and when you do need to run off of the battery, go ahead and use the battery until it runs down, so that you'll always do a FULL recharge. The LiPo batteries aren't harmed by partial recharges, but every recharge cycle counts, even if its only 10%.

The MacBook will shut-down before the battery is drawn down below its safety limit.
skinny*k is offline   0 Reply With Quote
Old Feb 2, 2013, 05:40 PM   #12
Puevlo
macrumors 6502a
 
Join Date: Oct 2011
That's how long it takes for the electrons at one end of the cable to reach the other end. So even when you unplug it some charge remains. Perfectly normal.
Puevlo is offline   0 Reply With Quote
Old Feb 2, 2013, 06:01 PM   #13
Robyr
macrumors regular
 
Join Date: Feb 2010
Quote:
Originally Posted by Puevlo View Post
That's how long it takes for the electrons at one end of the cable to reach the other end. So even when you unplug it some charge remains. Perfectly normal.
Did you seriously think that through?

It has nothing to do with speed. There are capacitors inside of the assembly. These capacitors hold charge, hence light after unplugging it.

Ugh.
__________________
Do not fark with your Mac if you don't know what you are doing.
Robyr is offline   1 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Notebooks > MacBook Air

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
MacBook Pro 2010 Dim Green Charger Light won't boot jimmcarrey23 MacBook Pro 1 Jun 11, 2014 06:02 PM
iPhone: Green battery when unplugged iOS 7 Gmerdude Jailbreaks and iOS Hacks 5 Mar 18, 2014 05:32 PM
Why is the charger for the Air different from the Macbook Pro? stanw MacBook Air 13 Nov 18, 2013 06:03 PM
2 month old MacBook Air shuts down with 40% battery when unplugged heliogenesis MacBook 1 Oct 31, 2013 07:46 PM
MacBook pro will not turn on at all and no green light on charger Auburnfanabby MacBook Pro 0 Sep 15, 2012 09:03 AM

Forum Jump

All times are GMT -5. The time now is 09:29 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC