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kingdLo

macrumors 6502
Original poster
Mar 20, 2009
273
2
In August this year I bought a refurb early 2015 rMBP 13" with 16GB ram. Seems my battery health is dropping at alarming rate.

I have 14 Load Cycles on it and battery health is reportedly 94% already.

I don't use it extensively just Safari and general use really nothing power hungry or intensive. Usually let it drain to about 20-30% before a full recharge. I have let it die completely or drain down to under 3% before charging as well.

At this rate in 6 more months I'll likely be under 80%.

Thoughts?
 

yillbs

macrumors 6502
Oct 2, 2015
382
158
Texas
You know their is no way for the software to give you an accurate presentation of the battery level. It's guessing based on the load cycles, but if you purchased it as a refurb, you have no idea how many load cycles were on it. As the guy above said, take it with a grain of salt, it fluctuates.
 

snaky69

macrumors 603
Mar 14, 2008
5,908
488
In August this year I bought a refurb early 2015 rMBP 13" with 16GB ram. Seems my battery health is dropping at alarming rate.

I have 14 Load Cycles on it and battery health is reportedly 94% already.

I don't use it extensively just Safari and general use really nothing power hungry or intensive. Usually let it drain to about 20-30% before a full recharge. I have let it die completely or drain down to under 3% before charging as well.

At this rate in 6 more months I'll likely be under 80%.

Thoughts?
Get rid of all monitoring software.

Now.

All it does is feed OCD behaviour over something you have abso-frickin'-lutely no control over.

Battery health will ALWAYS fluctuate up and down, depending on current load, temperature, charging state etc.

A battery is a consumable item. LiPo batteries do not give a crap how you take care of them. No matter how much you monitor and try to baby it, it'll die in 3-5 years (more if you're lucky) from plain old age. That's how long you can expect it to last and that's that.

Also, you can leave it plugged in as long as you want whenever you want. You don't need to be at a specific battery level to plug in. Those all are old battery myths that are outdated by at least 10 years.
 
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joe-h2o

macrumors 6502a
Jun 24, 2012
997
445
As Snaky says, you don't need to "condition" you battery any more. It has a controller in it that manages all that for you. If it feels that the battery needs to be under load for a bit to keep it healthy it will do that automatically, even if the charger is plugged in.

In short, just use it as normal. The reported health is just an estimate and it will fluctuate over time and over the lifespan of the battery (years) will trend downwards, but over the short term it will go up and down quite a bit.
 

Sekelani

macrumors 6502
May 26, 2012
273
76
I'm in the same boat as the op. My battery drains pretty fast. 4 hours tops. Using a 2013 MacBook Pro 15inch.
 

Samuelsan2001

macrumors 604
Oct 24, 2013
7,729
2,153
I'm in the same boat as the op. My battery drains pretty fast. 4 hours tops. Using a 2013 MacBook Pro 15inch.

That means nothing, if you are gaming 4 hours is a a lot, as it is if you are editing 4K video or have 20 apps and 50 tabs in chrome open with flash on every page. Without some idea of your usage it is impossible to tell what is causing it to drain so fast and wether that is normal. For example chrome is a terrible resource hog and hammers your battery, if you have one with a dGPU and connect it to an external screen it will always use the dGPU and will drain quicker, if you run windows you get far less battery etc etc etc. See below link for all your battery questions and tips to maximise life.

https://forums.macrumors.com/posts/9875442/
 

gsm_raj

macrumors newbie
Jun 6, 2020
1
0
iPhone Battery health depends on how much you consume battery charge. While the charger is connected disconnecting too many times also affect battery health. I suggest all the users never go below 20% and never charge up to 80%. The iPhone has a feature to optimize charging on. Never leave your iPhone on charging overnight.iPhone XR to up you can't see battery health after replacing. The battery works but you may lose health indicators. My iPhone xs max battery health was 82%. How I made Battery health 100% and its work for one time.
 

Hippocrates

macrumors member
Jun 12, 2012
95
33
iPhone Battery health depends on how much you consume battery charge. While the charger is connected disconnecting too many times also affect battery health. I suggest all the users never go below 20% and never charge up to 80%. The iPhone has a feature to optimize charging on. Never leave your iPhone on charging overnight.iPhone XR to up you can't see battery health after replacing. The battery works but you may lose health indicators. My iPhone xs max battery health was 82%. How I made Battery health 100% and its work for one time.
Don't think we should be too bothered about battery health. Not letting the battery drain below 20% or charge above 80% all the time means only 60% of battery capacity to use.

If I heck care about battery health and after 2 years of usage its health is at 85%. Isn't 85% full capacity still better than the imposed 60% limit?
 

kevink2

macrumors 68000
Nov 2, 2008
1,844
295
I abuse my battery on my 2015 since I generally run the computer on my recliner without cable to avoid damage to my cord. Previous mac I went through several power adapters.

On the other hand, my 2nd battery is now down to 74%, and the OS widget is telling me to do service.

So I have option of $200 for new battery (for computer that doesn't get the new OSs anymore, so a battery probably only extends life 1-2 years).
 
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