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2.6 GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.2 GHz) with 3 MB shared L3 cache. Released February 13, 2013.

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How long should my new laptop battery last?

I just bought and replaced my macbook pro retina 13in early 2013 battery from you. I was curious how long my battery should now last. In activity monitor, my predicted battery life is 4-5 hours. I have calibrated my battery and it doesn't seem like I am getting much more life than I was with my original battery. I'm not really using many programs or using settings that would drain my battery. Shouldn't my battery life now be what apple advertises for a new laptop (10 hours or so)?

Answer this question I have this problem too

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You can't compare a 2013 machine with a 2018 machine. Most of the time, the newer the machine the more battery life it has due to advances in technology.

Also companies tell you what kind of gas milage you will get under the most optimal conditions they can produce and then tell you your milage may vary. They also intentionally tell you it is better than it actually is. Sometimes they get caught: https://www.detroitnews.com/story/busine...

So you have to go to third party reviews to get to the truth. So here is the real world finding on that and it looks like 5 hours is about it:

https://everymac.com/systems/apple/macbo...

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