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当前版本: mruddy73 ,

标题:

New replacement MacBook Pro battery discharging erratically

文本:

Hello,
 
I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBook Pro 13inch Unibody.
 
The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.
 
I've done an SMC reset. No difference.
 
coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (tried uploading images but get a resolution error).
 
Is this a dud battery. Do I need a replacement from iFixit?
 
thanks
 
Mark
== Update == January 23, 2015
 
I'll accept @mayer's answer. After several days testing my MacBookPro *seems* to be performing normally. The replacement battery seems to be ok. However I do have some reservations.
 
So to recap I reinstalled OSX Mavericks using latest combo update. Did SMC and PRAM reset then did two discharge-recharge cycles. I'm now getting 5-6 hours from a full battery with low-medium use. Time remaining and estimated time to full is generally ok - at least there aren't any big jumps from say 50% to 100% or crashes from 50% to zero.
 
I'm still getting the impression though that OSX doesn't have a perfect handle on how much charge is on the battery and neither is coconutBattery. Occasionally the machine won't reboot after being down to ~30% charge but I'm not sure whether this is because of heavy apps that OSX is trying to reload after previous shutdown. Sleep seems ok and isn;t drastically draining battery.
 
As a rule of thumb how much charge can I expect to see lost during periods of x-amount of sleep (say overnight) or from shutdown to reboot (say overnight)?
 
As a further query the design capacity value from coconutBattery jumps from ~85% to ~96% between and during periods of recharge. Is this normal?
 
thanks all
 
Mark

设备:

MacBook Pro 13" Unibody Mid 2012

状态:

open

已接受的回答:

210572

编辑: mruddy73 ,

标题:

New replacement MacBook Pro battery discharging erratically

文本:

Hello,

I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBook Pro 13inch Unibody.

The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.

I've done an SMC reset. No difference.

coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (tried uploading images but get a resolution error).

Is this a dud battery. Do I need a replacement from iFixit?

thanks

Mark

设备:

MacBook Pro 13" Unibody Mid 2012

状态:

open

已接受的回答:

210572

编辑: oldturkey03 ,

标题:

New replacement MacBookproMacBook Pro battery discharging erratically
New replacement MacBookproMacBook Pro battery discharging erratically

文本:

Hello,
 
I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBookProMacBook Pro 13inch unibodyUnibody.
I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBookProMacBook Pro 13inch unibodyUnibody.
 
The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.
 
I've done an SMC reset. No difference.
 
coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (tried uploading images but get a resolution error).
 
Is this a dud battery. Do I need a replacement from iFixit?
 
thanks
 
Mark

设备:

MacBook Pro 13" Unibody Mid 2012

状态:

open

编辑: mayer ,

标题:

New replacement MacBookpro battery discharging erratically

文本:

Hello,

I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBookPro 13inch unibody.

The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.

I've done an SMC reset. No difference.

coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (tried uploading images but get a resolution error).

Is this a dud battery. Do I need a replacement from iFixit?

thanks

Mark

设备:

MacBook Pro 13" Unibody Mid 2012
MacBook Pro 13" Unibody Mid 2012

状态:

open

编辑: mruddy73 ,

标题:

New replacement MacBookpro battery discharging erratically
New replacement MacBookpro battery discharging erratically

文本:

Hello,

I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBookPro 13inch unibody.

The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.

I've done an SMC reset. No difference.

coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (tried uploading images but get a resolution error).

Is this a dud battery. Do I need a replacement from iFixit?

thanks

Mark

设备:

MacBook Pro

状态:

open

编辑: mruddy73 ,

标题:

New replacement battery discharging erratically

文本:

Hello,
 
I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBookPro 13inch unibody.
 
The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.
 
I've done an SMC reset. No difference.
 
coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (images attachedtried uploading images but get a resolution error).
coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (images attachedtried uploading images but get a resolution error).
 
Is this a dud battery. Do I need a replacement from iFixit?
 
thanks
 
Mark

设备:

MacBook Pro

状态:

open

原帖由: mruddy73 ,

标题:

New replacement battery discharging erratically

文本:

Hello,

I've just installed a replacement battery (bought from iFixit) for my mid-2012 MacBookPro 13inch unibody.

The battery charges up to 84% then jumps to 100%. On disconnecting power lead battery holds 100% for a minute then jumps back down to 84%.

I've done an SMC reset. No difference.

coconutBattery shows the jump in current charge from 5712mAh (fully charged) to 4784mAh (images attached).

Is this a dud battery. Do I need a replacement from iFixit?

thanks

Mark

设备:

MacBook Pro

状态:

open