Battery capacity drops by 3% every time I charge the battery

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Level 1

4 points

Battery capacity drops by 3% every time I charge the battery

I recently had the battery changed in my Macbook Pro 15 " Retina 2015. The battery is from Simplo model no. bq20z451.

The problem is that the battery capacity drops by 3% every time I charge the battery. After 11 charges, I have only 62.1 of the original capacity. The battery condition is described by the system as good !!

If I keep the power supply on all the time - then the battery capacity seems to stay at its current level.

Do any of you have similar experiences or any ideas on how to solve the problem?

Is it the right battery I have installed - on the Internet it seem that the battery fit a 13 "Macbook?

I'm sorry for my poor English - but it's probably better than your Danish.

[Re-Titled by Moderator]

MacBook Pro 15", macOS 10.13

Posted on Jan 22, 2020 4:58 AM

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Answer 1

dominic23

Level 10

84,018 points

Jan 22, 2020 1:26 PM in response to jph116

Please contact Apple Support. https://support.apple.com/da-dk/contact

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Answer 2

dominic23

Level 10

84,018 points

Jan 22, 2020 5:43 AM in response to jph116

Section: The battery status menu

While some third-party apps report on battery health conditions, the data reported by these apps may be inaccurate and isn't a conclusive indication of actual diminished system run time. It's best to rely on the information reported in the battery health menu, described above.

About Mac notebook batteries - Apple Support

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Answer 3

jph116 Author

Level 1

4 points

Jan 22, 2020 6:46 AM in response to jph116

Thank you for your reply.

Apple's own system overview confirms that the battery is now only 62% (5242 mAh) of the value it had at the time of installation ( > 8000 mAh).

What amazes me is that the battery still is considered to be in good condition with 62% capacity ??

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Answer 4

y_p_w

Level 6

17,762 points

Jan 22, 2020 3:19 PM in response to jph116

Even though Simplo makes Apple OEM batteries, if you got it elsewhere, it may not necessarily be identical to what Apple makes. There's also junk out there where they might spoof another brand/model number.

You might see if you can get an Apple Store to replace the battery. Apple really does this as a complete top case replacement. If your top case is in good condition they might be willing to do it. They need the top case in good working condition in order to create top case replacement parts with a new battery.

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Battery capacity drops by 3% every time I charge the battery

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