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battery health dropped from 85% to 45% suddenly (and now 0%)
- Thread starter oYx
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Yup. Haven't seen it on a Mac but it happened on one of my PCs once. The battery was about 6 months old, then one day out of the blue it started behaving very strangely. It would slowly lose the charge in a perfectly normal manner... 99%... 98%... 97%... then when it hit around 80% it would suddenly start dropping like crazy. 60! 40! *Poof* shutdown. It was like 1/5 of the battery was in perfect health and 4/5 were dead.
i don't use it plugged in all the time.
on average of once a week, the battery gets fully discharged (not done for discharging's sake, but during usage). and in the past couple of weeks, it had suddenly shut off several times, despite the battery reading telling me i have 50 minutes left or so.
glad i have applecare. will visit the apple store soon.
on average of once a week, the battery gets fully discharged (not done for discharging's sake, but during usage). and in the past couple of weeks, it had suddenly shut off several times, despite the battery reading telling me i have 50 minutes left or so.
glad i have applecare. will visit the apple store soon.
I will give this a try, as I am having the same issue as the OP.
MBP rev.4,1 - almost year and a half old. Used mostly plugged in, but suddenly battery helath dropped from around 90% to 40%.
Also reporting of charging and remaining time, is becoming erratic :-(
iStat is reporting only 42 cycles on the battery - I guess they should last around 3-500. The new built-in ones should do 1000 cycles!
No AppleCare, but will try to get a replacement due to the low cycle count, under the 2 year warranty (which goes for all products here in Denmark), if the 'calibration' doesn't work.
MBP rev.4,1 - almost year and a half old. Used mostly plugged in, but suddenly battery helath dropped from around 90% to 40%.
Also reporting of charging and remaining time, is becoming erratic :-(
iStat is reporting only 42 cycles on the battery - I guess they should last around 3-500. The new built-in ones should do 1000 cycles!
No AppleCare, but will try to get a replacement due to the low cycle count, under the 2 year warranty (which goes for all products here in Denmark), if the 'calibration' doesn't work.
wow. the batt suddenly became 0%.
the batt icon now has got an 'x' in it. can't think of any good mac os x jokes now though.
this is really worrying. after the smc 1.3 update, my mbp runs a good amount hotter, and now, this. as it is, i need my laptop for daily work. i'm now worried the gpu will die on me, denying me any display.
i've been so happy with the laptop.. up till now. have a feeling that after applecare is over, i'd be shown that this would be the worst computer purchase i've ever made, in terms of cost value!
don't take it the wrong way. i still prefer apple computers, but it's a shame my favourite laptop appears to be running so badly. just hope apple will make all of this right.
seems like the soonest available genius appointment here is on wed, and i can't make wed. probably give apple a call and see what's possible.
the batt icon now has got an 'x' in it. can't think of any good mac os x jokes now though.
this is really worrying. after the smc 1.3 update, my mbp runs a good amount hotter, and now, this. as it is, i need my laptop for daily work. i'm now worried the gpu will die on me, denying me any display.
i've been so happy with the laptop.. up till now. have a feeling that after applecare is over, i'd be shown that this would be the worst computer purchase i've ever made, in terms of cost value!
don't take it the wrong way. i still prefer apple computers, but it's a shame my favourite laptop appears to be running so badly. just hope apple will make all of this right.
seems like the soonest available genius appointment here is on wed, and i can't make wed. probably give apple a call and see what's possible.
for the past week or so, the battery went back to showing 45% battery life. however, i finally managed to get the right appointment, and i made the trip to the apple store today.
the very friendly genius booted up my mbp with a diagnostic tool and within seconds, it showed that the battery was bad.
he removed the battery, and to my surprise, it was bloated. i have never noticed that before because my mbp has a speck protective case, so the bottom is always flat and doesn't rock despite the bloated battery.
according to the genius, sony batteries have a likelihood to suffer from that problem. i never knew mine was a sony battery, because it never occurred to me that it mattered so i never checked. searched online, and it seems that there are many cases of bloated sony batteries. the replacement battery is manufactured by smp, which apparently is a more durable battery. would have cost me £77, but applecare took care of that.
i'm trying to calibrate the battery now – trying to run the battery power down after leaving it fully charged for at least 2 hours – and the cpu temperature is about 48°C on average 'idle' (ethernet, wifi off, firefox, adium, vuze, tweetdeck). also using fancontrol with base speed at 2000 rpm (threshold: lower at 40, higher at 70).
the laptop feels cool and quiet, the way it should be.
apple's service is painless (though was slightly hard to get a convenient appointment at the regent street store in london), and applecare makes sense.
the very friendly genius booted up my mbp with a diagnostic tool and within seconds, it showed that the battery was bad.
he removed the battery, and to my surprise, it was bloated. i have never noticed that before because my mbp has a speck protective case, so the bottom is always flat and doesn't rock despite the bloated battery.
according to the genius, sony batteries have a likelihood to suffer from that problem. i never knew mine was a sony battery, because it never occurred to me that it mattered so i never checked. searched online, and it seems that there are many cases of bloated sony batteries. the replacement battery is manufactured by smp, which apparently is a more durable battery. would have cost me £77, but applecare took care of that.
i'm trying to calibrate the battery now – trying to run the battery power down after leaving it fully charged for at least 2 hours – and the cpu temperature is about 48°C on average 'idle' (ethernet, wifi off, firefox, adium, vuze, tweetdeck). also using fancontrol with base speed at 2000 rpm (threshold: lower at 40, higher at 70).
the laptop feels cool and quiet, the way it should be.
apple's service is painless (though was slightly hard to get a convenient appointment at the regent street store in london), and applecare makes sense.
Just FYI, same thing happened to me - 90 to 48% seemingly overnight.
Brought it into Apple store, he hooked up the little diagnostic iPod - booted from it, it has a pretty simple GUI that tells whether the battery has been 'Consumed' or 'Bad' and since mine was bad, they're replacing it for free. Didn't have it in stock so I have to go back to the Apple Store.
Brought it into Apple store, he hooked up the little diagnostic iPod - booted from it, it has a pretty simple GUI that tells whether the battery has been 'Consumed' or 'Bad' and since mine was bad, they're replacing it for free. Didn't have it in stock so I have to go back to the Apple Store.
