Every time my battery dies, my macbook resets to December 31, 2000...

[andyACEcandy]

And I have to reset it back to the right time and date before I can get anything to function.

What's this all about? Any fix? Thanks!

It's a 2009 MacBook Pro for what it's worth

 

[GGJstudios]

And I have to reset it back to the right time and date before I can get anything to function.

What's this all about? Any fix? Thanks!

It's a 2009 MacBook Pro for what it's worth

Don't let your battery drain all the way and it won't happen. It's not good for the battery to fully drain it frequently.

The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.

Apple Notebook Battery FAQ​

 

[alphaod]

That's normal.

Your computer requires power to keep time, so it's best advised to turn it off before it reaches 0%.

 

[hackerwayne]

And I have to reset it back to the right time and date before I can get anything to function.

What's this all about? Any fix? Thanks!

It's a 2009 MacBook Pro for what it's worth

don't let your battery drain till finish. Thats the fix.

 

[adjeff8]

And I have to reset it back to the right time and date before I can get anything to function.

What's this all about? Any fix? Thanks!

It's a 2009 MacBook Pro for what it's worth

My 2009 MacBook Pro does the same thing. I hear what you are all saying, don't let it drain to zero, but irregardless, isn't there supposed to be some kind of internal battery to prevent the date and time from resetting?

 

[andyACEcandy]

Also, it was kinda weird... I got notified of low battery %, saw I had 15% then next thing I know, it powered down.

Coconut battery says I have 57% remaining of my original battery. It's probably time for a new one, but yeah I thought there was an internal battery that kept the time from resetting

 

[maxosx]

Windows laptops have a battery to keep the time & date maintained when the main battery is discharged.

 

[Toby Ziegler]

There's usually a button cell battery or capacitor on the motherboard that prevents the date & time along with other settings from being reset in the event that there's no other power available.

It's not normal for that to happen, even if your battery hits zero.

 

[GGJstudios]

Also, it was kinda weird... I got notified of low battery %, saw I had 15% then next thing I know, it powered down.

While your battery shouldn't need calibrating, it wouldn't hurt to try it to see if your readings are more accurate. See the CALIBRATION section of the Battery FAQ I posted for instructions.

Coconut battery says I have 57% remaining of my original battery. It's probably time for a new one, but yeah I thought there was an internal battery that kept the time from resetting

There used to be a separate backup battery, but not anymore.

 

[jafingi]

The CMOS battery is defective. You can replace it, or just stop draining the Macbook battery to 0%

 

[GGJstudios]

The CMOS battery is defective. You can replace it, or just stop draining the Macbook battery to 0%

There is no CMOS (PC) or PRAM (Apple) battery in the OP's MBP. See my last post.

 

[jafingi]

There is no CMOS (PC) or PRAM (Apple) battery in the OP's MBP. See my last post.

Ohh! Didn't see it was a 2009 MBP

 

[cosmichobo]

To tag along here...

My 2009 MacBook Pro 13" used take a snapshot, and go to sleep when the battery reached "critical"... And when you connected power, you needed to press the power button to wake the computer, and it would reload that snapshot, including the date/time.

However recently this function is not being performed.

Is that simply a sign of the battery's age? I was assuming it was the PRAM battery, until reading here that there is no PRAM battery in this model...

Is or isn't there a capacitor that could be faulty?

Where to flies go at night?

cheers

cosmic