After my MBP's battery runs out, I have to press the power button twice to turn it on, is this an error?

Question

Level 1

0 points

After my MBP's battery runs out, I have to press the power button twice to turn it on, is this an error?

The grayed out start screen that often occurs after the computer's battery has completely ran out occurs twice on my comp. This screen signifies that the computer is waking up from hibernation, so to speak, and I assume of course. This disconcerts me because I would assume that there would be a single progres bar/loading screen, rather than two. If this is normal behavior, please tell me, and if not, do you have any ideas about what I could do to fix this?

Thanks!

MacBook Pro, OS X Mountain Lion (10.8.3)

Posted on Apr 25, 2013 9:15 AM

Reply

Answer 1

Apr 25, 2013 9:32 AM in response to CalWilliams

This is not normal - in the future - do not let your battery get fully discharged so you won't have these issues.

If you keep getting this issue - it's best to take it to Apple and have them take a look at it.

Try doing a SMC RESET and see if that sorts it out for you.

Reply

Answer 2

Csound1

Level 9

59,973 points

Apr 25, 2013 9:59 AM in response to CalWilliams

Also bear in mind that fully discharging your battery is not good for it and may shorten its life, reset the SMC per Bimmer 7

Reply

Answer 3

CalWilliams Author

Level 1

0 points

Apr 25, 2013 1:00 PM in response to Csound1

Why would fully discharging the battery shorten its life? And I understand that we're talking about overall longevity of the battery.

Reply

Answer 4

Apr 25, 2013 1:04 PM in response to CalWilliams

Batteries

Reply

Answer 5

Csound1

Level 9

59,973 points

Apr 25, 2013 1:26 PM in response to CalWilliams

Lithium Ion batteries should be recharged at (approx) 40-50%, fully discharging them is not recommended and will shorten their lifespan. There is also a danger that a singe cell will drop below its minimum voltage (3.2v) the cell will normally not recover and the battery will become unusable.

The day of the NiCad battery is long gone (Nicads had to be fully discharged before recharging) sadly it has yet to be forgotten.

Reply

Answer 6

CalWilliams Author

Level 1

0 points

Apr 20, 2014 5:31 PM in response to CalWilliams

This problem has seemed to resolve itself, strangely enough. Sorry if that isn't helpful web denizen.

Reply