跳转到主内容

发布于 2012 年 6 月, 型号 A1278. Intel 处理器,支持 Turbo Boost, 最多 512 MB DDR5 显存

1259 个问题 查看全部

New replacement MacBook Pro battery discharging erratically

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

已回答! View the answer 我也有这个问题

这是一个好问题吗?

按维修分数 3

评论:

What was happening with the old battery?

Had service warning on old battery

添加一条评论

PC 笔记本电池

An easy fix for a big power boost.

现在开始购物

PC 笔记本电池

An easy fix for a big power boost.

现在开始购物

1个答案

已选择的解决方案

You may need to reinstall your system and/or update your firmware. Here's an excellent question on the problem: Erratic "Battery Charging /Not charging"

UPDATE

put the old battery back in, run Coconut Battery and post your results. Tell us if the battery gives you a red or black X.

这个答案有帮助吗?

按维修分数 1

评论:

OK thanks. I'll try PRAM reset and SMC reset again, then complete discharge/recharge cycles and see what the result is.

I'll reinstall old battery and post coconut results if my first attempted solutions don't work.

@mayer - Went through 1 full discharge/recharge cycle. Following this the battery discharged as expected from 100% without any jumps. However, MacBookPro on standby still drained battery as though awake. I then performed an SMC reset and PRAM reset. Battery use now *seems* to be functioning normally.

Thanks for your help

One further question. On coconutBattery the design capacity reading has jumped from 99% (first start-up after battery install), to 96% (after discharge/charge cycle), to 97.3% (after SMC/PRAm reset), to 96.3% (after a test period of sleep). Is this significant? OSX Battery status still good, operating temperature 25.6degC, discharging 12 Watts at current low usage.

wait. Still not good. Crashed 100% to 50% just now. hmmm

You accepted my answer, did the problem rectify itself?

显示更多的1条评论

添加一条评论

添加你的答案

mruddy73 将永远感激不已
浏览统计数据:

过去的24小时: 0

过去的7天: 3

过去的30天: 30

总计 1,648