Battery health dropping fast?

Discussion in 'MacBook Pro' started by kingdLo, Oct 3, 2015.

  1. kingdLo macrumors 6502

    Mar 20, 2009
    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%.

  2. T5BRICK macrumors G3


    Aug 3, 2006
    Battery health fluctuates up and down. Don't worry about it.
  3. yillbs macrumors 6502


    Oct 2, 2015
    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.
  4. kingdLo thread starter macrumors 6502

    Mar 20, 2009
  5. snaky69 macrumors 603

    Mar 14, 2008
    Get rid of all monitoring software.


    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 Those all are old battery myths that are outdated by at least 10 years.
  6. joe-h2o macrumors 6502a

    Jun 24, 2012
    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.
  7. Sekelani macrumors 6502


    May 26, 2012
    I'm in the same boat as the op. My battery drains pretty fast. 4 hours tops. Using a 2013 MacBook Pro 15inch.
  8. Samuelsan2001 macrumors 604

    Oct 24, 2013
    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.

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7 October 3, 2015