No need to baby your battery

Discussion in 'MacBook Pro' started by BeeJee, Feb 2, 2015.

  1. BeeJee macrumors 6502

    Nov 27, 2011
    Long Island/North Jersey
    I see a lot of talk about keeping the battery healthy on MacBook Pro's. Here is my 2011 refurb with 828 cycles, iStat shows 91% health. I'll take that any day of the week. I leave my computer in the freezing car, in the summer heat, charge and take it off whenever I want, leave it dead for days, pretty much don't go out of my way at all.
    Screen Shot 2015-02-02 at 9.20.32 AM.png
  2. rosario1990 macrumors 6502

    Feb 1, 2015
    Dhaka, Bangladesh
    According to your say you're happy what you have. You not need to keep your computer along with you cause you're battery is going well. You can use this whenever you want. That's great!
  3. GGJstudios macrumors Westmere


    May 16, 2008
    Run on battery whenever you need to and plug it in whenever you can. You can plug or unplug any time you need to, regardless of the charged percentage, and you never need to completely drain your battery.
    The link below should answer most, if not all, of your battery/charging questions, including tips for maximizing battery performance. If you haven’t already done so, I highly recommend you take the time to read it.
  4. Natzoo macrumors 65816


    Sep 16, 2014
    Not sure where i am
    mine had 90% and it went up to 93% when i left it charging all night. I figured how to download Istat menu after the trail has been used. Delete the app, restart your laptop and then re-download it.
  5. GGJstudios macrumors Westmere


    May 16, 2008
    Charging it all night has zero effect on battery health. Battery health will fluctuate up or down, regardless of when or how you charge it. You can charge Macs all night most nights and the battery health will not change. The two events are coincidental and are unrelated.
  6. Skika macrumors 68030

    Mar 11, 2009
    I recently bought a new rMBP 15, what are the steps i should take for taking care my battery stays healthy? Or should i just not care at all like op suggests? I ask this because i will mostly use it on power in clamshell mode with an external display.
  7. GGJstudios macrumors Westmere


    May 16, 2008
    Read post #3.
  8. Skika macrumors 68030

    Mar 11, 2009
    Im sorry but i have zero clue about what post number 3 is about.

    Edit:i was looking at the post number 3 starting after op, sorry makes sense now.
  9. blooperz macrumors 6502

    Dec 10, 2013
    mine is at 92% after ~ 400 cycles...has been in the 90-95% range for quite some time without falling below that..I leave my laptop plugged in probably 85-90% of the time including overnight (every night)...I don't really worry about it. People that worry obsessively about maintaining battery health and charge cycles are wasting their time, it simply doesn't provide the benefit it once did.
  10. redheeler macrumors 604


    Oct 17, 2014
    Coming "pre-calibrated" doesn't exactly reassure me, it would still be a good thing to calibrate it once every 1-2 months. That being said I haven't calibrated my rMBP in ages since I rarely if ever run it past 30%.

    The myth that leaving a Macbook plugged in all the time will not apply cycles and keep the battery fresh needs to be debunked as well.
  11. GGJstudios macrumors Westmere


    May 16, 2008
    It's not just that they are pre-calibrated. Apple also states that they don't require calibration like the older, removable batteries.
    The only way cycles will increase when the battery is plugged in is if there is sufficient power demand to draw on both the battery and AC power combined. Once a battery is fully charged, it stops charging and runs on AC power as long as it's plugged in.
  12. Richyrich1975 macrumors member

    Jul 1, 2009
    2 things to avoid:

    1, Not using the battery at all i.e. Keeping it plugged in constantly, try and use the battery at least once a month.

    2, Don't totally drain the battery often.

    This is all to do with the chemistry of Li-ion batteries.
  13. KUguardgrl13 macrumors 68020


    May 16, 2013
    Kansas, USA
    That's impressive. The original battery from my 2009 MBP dropped to 70% health around 400 cycles. I didn't baby it, but I also suspect that the MagSafe cable didn't help it. I had one of the t-shaped ones from the recall that I replaced about a year and a half ago.

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12 February 2, 2015