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Apple Computing Products:
macOS - Notebook Hardware
MacBook has erratic battery behaviour
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<blockquote data-quote="iBookMacBook" data-source="post: 1640849" data-attributes="member: 343966"><p>Hi; hopefully somebody might know what this is caused by. I have built a MacBook up out of parts and am pleased with it, but the new non OEM SMC battery seems problematic. Firstly, it displays way more mAh than it should have inside it 7300+ instead of the correct 5000 mHa and the time till empty jumps from 7 to 4 hours and back again when fully charged. Not only that, when down to less than 40% it can cause the laptop to just shut off completely, and in this case it will sometimes but not always boot all the way back up again without power cord connected when the power button is pressed.</p><p></p><p>I may have done wrong by charging the brand new battery rather than discharging when first installed, and I have since read that they should either be discharged fully at first or charged without the computer on. I am wondering; is there any way to rectify this? Another thing I noticed is that when it is fully charged, I can remove the power for 5 seconds and re apply, and it will charge again for several minutes before saying fully charged again. I decided it was confused and tried doing this repeatedly for ages in order to actually fully charge the battery. So really, I think the problem is one of calibration, and I don't see any way out of this. Any help would be much appreciated.</p><p></p><p>Thank you</p></blockquote><p></p>
[QUOTE="iBookMacBook, post: 1640849, member: 343966"] Hi; hopefully somebody might know what this is caused by. I have built a MacBook up out of parts and am pleased with it, but the new non OEM SMC battery seems problematic. Firstly, it displays way more mAh than it should have inside it 7300+ instead of the correct 5000 mHa and the time till empty jumps from 7 to 4 hours and back again when fully charged. Not only that, when down to less than 40% it can cause the laptop to just shut off completely, and in this case it will sometimes but not always boot all the way back up again without power cord connected when the power button is pressed. I may have done wrong by charging the brand new battery rather than discharging when first installed, and I have since read that they should either be discharged fully at first or charged without the computer on. I am wondering; is there any way to rectify this? Another thing I noticed is that when it is fully charged, I can remove the power for 5 seconds and re apply, and it will charge again for several minutes before saying fully charged again. I decided it was confused and tried doing this repeatedly for ages in order to actually fully charge the battery. So really, I think the problem is one of calibration, and I don't see any way out of this. Any help would be much appreciated. Thank you [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
MacBook has erratic battery behaviour
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