Mid 2012 rMBP Battery Life Dwindling?

[alexmarchuk]

I do use the machine a lot, so understandably the battery has been used quite a bit. coconutBattery claims the battery is "good", I guess for it's age and usage it could be considered normal. Wanted to get a sense of how similar or different my machine is compared to the forum.

coconutBattery read out:

MacBook Pro
Retina, Mid 2012

Model: MacBookPro10,1
Manufacture date: 2012-07-02
---
Battery Details:
Manufacturer: SMP
Model: bq20z451
Manufacture date: 2012-06-23
Age: 872 Days
Loadcycles: 381
Serial: xxx
OS X Battery status: Good
Battery temperature: 39.5C
Battery failure: None
Battery usage: 30.5 watts
---

Current Charge: 1506mAh
Maximum Charge: 7560mAh (19.1%)
Design Capacity: 8460mAh (89.1%)

---

Does the 89.1% equate to how much of my original capacity I have today? Furthermore, is this a good percentage?

 

[GGJstudios]

Does the 89.1% equate to how much of my original capacity I have today? Furthermore, is this a good percentage?

Yes, that's what it means. Your battery is fine. It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time. The gradual decline is not in a straight line downward, and it may decline more rapidly at some times and slower at others. For further details, read the CHECKING STATUS AND HEALTH section of the following link.

​

The link below should answer most, if not all, of your battery/charging questions. If you haven't already done so, I highly recommend you take the time to read it.

Apple Notebook Battery FAQ​

 

[alexmarchuk]

Thank you for the response, I appreciate it. I really do use the crap out of the machine, it takes a good beating. I was wondering whether having Apple replace the battery (Is it $199 or so?) would give me better battery life.

 

[GGJstudios]

Thank you for the response, I appreciate it. I really do use the crap out of the machine, it takes a good beating. I was wondering whether having Apple replace the battery (Is it $199 or so?) would give me better battery life.

There are many factors that impact your battery life. See the BATTERY LIFE FROM A CHARGE section of the FAQ for details, including tips on how to maximize your battery life.

 

[alexmarchuk]

Great guide, very useful. Again though, would it be worthwhile scrapping this battery and having Apple replace it with a new one?

 

[GGJstudios]

Great guide, very useful. Again though, would it be worthwhile scrapping this battery and having Apple replace it with a new one?

I wouldn't do that until the battery health is much lower.

 

[alexmarchuk]

I wouldn't do that until the battery health is much lower.

I don't want it to last 1000 cycles, . At around 500 cycles I think I will entertain that possibility as the battery life isn't up to par as it used to be, considering the already limited battery life.

 

[cjmillsnun]

Apple advise replacement when the battery health is lower than 80%.

 

[GGJstudios]

I don't want it to last 1000 cycles, . At around 500 cycles I think I will entertain that possibility as the battery life isn't up to par as it used to be, considering the already limited battery life.

Suit yourself. Apple won't consider replacing it free unless it's below 80% before 1000 cycles.

 

[alexmarchuk]

Apple advise replacement when the battery health is lower than 80%.

Yeah, I read this earlier today in many places. Now that I'm plugged in I'm seeing slightly different numbers. I assume this is because of the fluctuations during charge?

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Maximum charge: 7894 mAh (17.1%)
Design capacity: 8460 mAh (93.3%)

Suit yourself. Apple won't consider replacing it free unless it's below 80% before 1000 cycles.

Nothing on this machine is free anymore, lol.

 

[GGJstudios]

Yeah, I read this earlier today in many places. Now that I'm plugged in I'm seeing slightly different numbers. I assume this is because of the fluctuations during charge?
Maximum charge: 7894 mAh (17.1%)
Design capacity: 8460 mAh (93.3%)

As stated in my first post: It is perfectly normal if your battery health (maximum capacity) is more or less than 100%, even when brand new, or if it fluctuates up or down over time.

 

[cjmillsnun]

Yeah, I read this earlier today in many places. Now that I'm plugged in I'm seeing slightly different numbers. I assume this is because of the fluctuations during charge?

---

Maximum charge: 7894 mAh (17.1%)
Design capacity: 8460 mAh (93.3%)




Nothing on this machine is free anymore, lol.

If your machine is less than 6 years old, the sale of goods act applies (except for things like the charger or the battery)

 

[alexmarchuk]

If your machine is less than 6 years old, the sale of goods act applies (except for things like the charger or the battery)

I was just generalizing, but after getting the image retention issue settled with a new display, I have had exactly zero hardware issues, couple that with no warranty nor Apple Care anymore, I'm just waiting for something to go wrong.