Power Issue?

[SayCheese]

Hi all,

I have a late 2007 MBP 15inch 2.33Ghz Core 2 Duo. I have had since new and no problems.

Over this last week I have had the same issue a couple of times. The MBP just switches itself off. The first time it did it, it was running on battery (I was using Aperture) and had 60% power available. It would refuse to re-start until I connected it to the mains and then it ran fine.
Then it did the same thing overnight at some point. I had left it connected to the mains (as I always do at home), had shut the lid to put it into sleep mode. When I came back it was switched off. No-one had touched it whilst I was away but yet it had just turned itself off.

The only thing that I noticed was that when I started it up both times the little light on the magsafe connecter kept flashing between orange and green. However when the computer booted into OS X both times it showed a reasonable amount of power in the battery.

Any ideas as to whats going on please people? Is it the battery? Power Supply unit? Other issue?

All suggestions appreciated.

Thanks

 

[GGJstudios]

Have you calibrated properly, to make sure the readings are accurate?
This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

 

[SayCheese]

Thanks, will try that. Don't think i've ever calibrated the battery.
Not sure why it would have affected it last night though as was on mains power.

 

[SayCheese]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-gb) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

I've just gone through the first part of that. I timed it and got 34mins from 100% to shutdown. All I was doing was websurfing with Safari.
I suspect the battery is on it's way out.

 

[Stvwndr219]

Sounds like my battery - had the exact same experience except it was beyond toast: 39 cycles and 27% health... ehh

It would work for a bit and then spontaneously shut off, no warnings. Sounds a lot like the battery. My supervisor at the college help desk has the battery testing software - kinda wish I had it too lol. It was able to diagnose right away.

I would recommend coconut battery or something similar and if you want to get it confirmed officially, you can always visit a genius at the apple store.