Expected battery time mac book 2015 with a new battery

Question

yoshoki Author

Level 1

4 points

Expected battery time mac book 2015 with a new battery

Hi guys!

I have just bought a second hand macbook pro 13" 2015

A1502 with all the upgrades such as the 3.1 GHz Core i7 (I7-5557U).

I have had the battery professionally replaced.

The battery health software says the battery is 4 years old and at 92% health.

I ran a practical battery test mentioned in here:

https://www.macworld.com/article/2926932/battery-life-go-all-day-with-any-apples-mac-laptops.html

It says I should expect 14 hrs of video play back , offline on 75% screen brightness.

I only got 5.5hrs.

is my battery ok ?

could the fact that it was made 4 years ago be the problem ?

is it common to get more recent manufacture years for the replacement batteries for these macbooks ?

Thanks for your help.

MacBook Pro

Posted on Jan 28, 2020 7:12 PM

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Answer 1

yoshoki Author

Level 1

4 points

Jan 28, 2020 9:40 PM in response to kaz-k

Thank you for that web link.

From the link you provided there was a link to here :

https://support.apple.com/kb/SP715?viewlocale=en_US&locale=en_US

it says the macbook 2015 13" should get:

Up to 10 hours wireless web
Up to 12 hours iTunes movie playback

but mine is 5.5hrs . It doesn't seem healthy.

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Answer 2

y_p_w

Level 6

17,654 points

Jan 29, 2020 7:48 PM in response to yoshoki

yoshoki wrote:

anyone got any ideas ?

The battery could have lost some of its original capacity. I'd almost guarantee that it has after 4 years. That's just what rechargeable batteries do. Also - if it was an aftermarket battery, there's a possibility that it's not really playing nice with the power management system.

You could have something running in the background. There's always the possibility that the video you're running is more taxing on the processor than the test video that MacWorld used.

Have you looked in Activity Monitor under Power to see what's using up power?

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