I've just drained my battery until it went into sleep. On sleep, I directly hold the power button to power off instead of waking it up again to shut down through the OS. Now power plugged-in and charging overnight. My question did it really power down correctly?
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
11 Months Old MBP's Battery - 93% Health / 17 Cycles
- Thread starter jlin615
- Start date
- Sort by reaction score
Well, since I'm assuming that you want to calibrate, the easiest way to do this is simply to let your computer sleep for more than 6 hours. Once at least 6 hours have passed, you can plug the AC power back in. This will calibrate your battery.
I just calibrated my battery yesterday. It had over 70 cycles and was at about 93% or thereabouts. When I went to use my MBP this morning, I reached for it and the MagSafe let go. The MBP died. Weird, I'm thinking.
I powered it back up, and lo and behold, I have the dreaded "X" on the power icon. I reset the SMU, etc., all to no avail. Lucky for me, I had just bought a used battery from a MR member in the Marketplace, so I popped that in.
It worked!
I called AppleCare this morning, went through all the checks (again) with the tech, and am now waiting for my replacement battery. What's interesting is that the battery that failed was a replacement for my original battery, which was replaced under the the battery replacement campaign.
MacDann
I powered it back up, and lo and behold, I have the dreaded "X" on the power icon. I reset the SMU, etc., all to no avail. Lucky for me, I had just bought a used battery from a MR member in the Marketplace, so I popped that in.
It worked!
I called AppleCare this morning, went through all the checks (again) with the tech, and am now waiting for my replacement battery. What's interesting is that the battery that failed was a replacement for my original battery, which was replaced under the the battery replacement campaign.
MacDann
Oh great, after letting it charge to full overnight. Check out the new result.
But are you sure you calibrated correctly? In any case, it looks like your battery has gone bad, or at least it isn't holding the charge it ought to. Calibrate once more (just to be safe) and then see if it remains below 85%. If it does, you need to contact Apple.
On my now dead battery, I had this happen several times, where after calibrating, it would have a precipitous drop in capacity. I found that if I let it discharge a bit, maybe down to 75% or so, then charged it back up to full capacity, it would regain the better part of its capacity.
Not all of it, mind you, but a good part of it.
This is why I just bought another battery off of a forum member. My battery, despite having been replaced, was still hinky as far as I am concerned.
MacDann
Not all of it, mind you, but a good part of it.
This is why I just bought another battery off of a forum member. My battery, despite having been replaced, was still hinky as far as I am concerned.
MacDann
I'm gonna try calibrating that thing one more time. From full charged state, drained the battery continuiously (no shutdown/restart), when it goes to sleep I'm gonna wake it up to shut it down through the OS, then plug in the power adapter and wait for it to be full charged (until green light). The last time I just hold the power button when it got to sleep, I realized that it didnt actually shutdown but just went into a powerless sleep (data saved to hard drive, power off).
I hate to contact AppleCare for replacement, I really prefer my hardwares to be as original as possible.
That's not how calibration works. You need to let your computer rest for 6 hours (at least) WITHOUT plugging in the AC adapter. This is to ensure that the battery dies completely. Once your battery has been dead for AT LEAST 6 hours, you can plug the AC back in. Read more here.
As for new hardware, Apple will probably just send you a new battery.
Update
I did another round of calibration after my last post, even let it rest in sleep for 7 hours before recharging. Unfortunately the health stayed at 65%.
I have a new battery delivered today from AppleCare. I'm still on Battery Update 1.2, gonna wait install the Battery Update 1.3 AFTER the new gets calibrated tonight. Not gonna bother to install 1.3 on the old battery to see if any improvements.
Hopefully with this Battery Update 1.3 and a new battery, I can get the best life and performance out of it.
I did another round of calibration after my last post, even let it rest in sleep for 7 hours before recharging. Unfortunately the health stayed at 65%.
I have a new battery delivered today from AppleCare. I'm still on Battery Update 1.2, gonna wait install the Battery Update 1.3 AFTER the new gets calibrated tonight. Not gonna bother to install 1.3 on the old battery to see if any improvements.
Hopefully with this Battery Update 1.3 and a new battery, I can get the best life and performance out of it.
The F? I purchased my unit in September. 21 cycles and it already degraded to 96% health.
96% is nothing to worry about, battery capacity fluctuate all the time. all these battery health thread got people paranoid
mine is higher also - by 57mAh - happened after the last battery update.
12 weeks, 5 cycles, 91%
Calibration took even one percent from my previous 92%...
MBP 13 - 7.1, bought in septmeber, battery is loosing a percent every week. Whole day on AC...
Can they replace battery while not taking my MBP away for week? I need it for my job
Thanks for recomandation.
Calibration took even one percent from my previous 92%...
MBP 13 - 7.1, bought in septmeber, battery is loosing a percent every week. Whole day on AC...
Can they replace battery while not taking my MBP away for week? I need it for my job
Thanks for recomandation.
Calibrating does not improve battery health.
It simply makes the battery meter take more accurate readings. Don't calibrate it too often, it is both useless and bad for the battery to do so.
Why did you buy a laptop if it never leaves the AC? Use your battery more, that's what it's there for!