Losing Power While in Sleep Mode

[nerdeus]

So I've noticed this VERY recently.. and this is pretty much happening after I had to replace my MagSafe adapter because the wires were being exposed and the adapter got super hot and stopped working. Anyway, after I got that replaced, I've noticed that my MacBook doesn't keep it's battery life while in sleep mode anymore! I charge it during the day and I use it a little bit before going to bed, and then I close the lid. Usually, when I open it back up in the morning, I still have a bunch of battery life left... now, it open it and it's giving me the Low Battery warning!

I'm wondering if this is because of my MagSafe problem? Or was that just a coincidence and all batteries do that after a while? I've had my MacBook since September 2006.

Any help would be much appreciated! Thanks!

 

[xUKHCx]

It is natural for the battery to be used while in sleep mode as the computer stores its memory in the ram and power is needed to keep that alive. So it is acceptable to lose some battery over that period.

How much are you losing? and I suppose how long do you sleep for?

 

[nerdeus]

I sleep for about.. 6 hours. And the battery is 75% - 100% full when I put it to sleep. And it goes down to pretty much 0 when I open.

 

[Igantius]

Have you tried recalliberating the battery recently?

 

[nerdeus]

I don't know what recalibrating the battery is! so i guess no! heh. please explain?

Edit: Ok, I just went on the Apple Support site and looked it up. I guess i'll give it a try. It sounds like it's what I usually do anyway, but I'll follow it to the T. THANKS!

 

[xUKHCx]

That is too a lot but the numbers could be wrong, as suggest calibrate your battery.

I don't know what recalibrating the battery is! so i guess no! heh. please explain?

Calibrating your computer's battery for best performance

Specifically

The battery calibration for the PowerBook G4 (15-inch Double-Layer SD) and any model of MacBook or MacBook Pro has been updated because of a new battery released with this computer. With these computers, follow these steps to calibrate your battery:

1. Plug in the power adapter and fully charge your PowerBook's battery until the light ring or LED on the power adapter plug changes to green and the onscreen meter in the menu bar indicates that the battery is fully charged.
   
2. Allow the battery to rest in the fully charged state for at least two hours. You may use your computer during this time as long as the adapter is plugged in.
   
3. Disconnect the power adapter with the computer still on and start running the computer off battery power. You may use your computer during this time. When your battery gets low, you will see the low battery warning dialog on the screen.
   
4. Continue to keep your computer on until it goes to sleep. Save all your work and close all applications when the battery gets very low, before the computer goes to sleep.
   
5. Turn off the computer or allow it to sleep for five hours or more.
   
6. Connect the power adapter and leave it connected until the battery is fully charged again.
   

Tip: When the battery reaches "empty", the computer is forced into sleep mode. The battery actually keeps back a reserve beyond "empty", to maintain the computer in sleep for a period of time. Once the battery is truly exhausted, the computer is forced to shut down. At this point, with the safe sleep function introduced in the PowerBook G4 (15-inch Double-Layer SD) computers, the computer's memory contents have been saved to the hard drive. When power is restored, the computer returns itself to its pre-sleep state using the safe sleep image on the hard drive.

 

[Igantius]

I don't know what recalibrating the battery is! so i guess no! heh. please explain?

Edit: Ok, I just went on the Apple Support site and looked it up. I guess i'll give it a try. It sounds like it's what I usually do anyway, but I'll follow it to the T. THANKS!

Let us know if that does the trick!

 

[wordmunger]

I have found with some macs that leaving bluetooth on while sleeping can be a big drain. You might give that a try.

 

[ntrigue]

I'd highly recommend SmartSleep.
Apple tech will recommend a PRAM reset
As suggested calibration wouldn't hurt either.

 

[mwp98223]

So I've noticed this VERY recently.. and this is pretty much happening after I had to replace my MagSafe adapter because the wires were being exposed and the adapter got super hot and stopped working. Anyway, after I got that replaced, I've noticed that my MacBook doesn't keep it's battery life while in sleep mode anymore! I charge it during the day and I use it a little bit before going to bed, and then I close the lid. Usually, when I open it back up in the morning, I still have a bunch of battery life left... now, it open it and it's giving me the Low Battery warning!

I'm wondering if this is because of my MagSafe problem? Or was that just a coincidence and all batteries do that after a while? I've had my MacBook since September 2006.

Any help would be much appreciated! Thanks!

I am having this EXACT problem. I zapped PRAM yesterday following advice on this thread. A FULL battery is dead this morning when I tried to wake the MacBook from a full night (~14 hours sleep)