Battery Health

Discussion in 'Apple Forum' started by Shoka, Feb 9, 2009.

  1. Shoka

    Shoka
    Well-known Member

    Joined:
    Jan 10, 2002
    Messages:
    4,330
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Surrey
    Ratings:
    +238
    A bot of battery help please guys:

    I Have a late 2008 White MacBook 2.4 Dual Core, which has been through 43 charging cycles. I always make sure the battery is fully drained before charging and rarely leave it on charge when the battery is full, however today when it I checked the battery health (using iStat Pro) I noticed it had dropped from 100% to 99%, and then within the space of half an hour of using it it has dropped to 98%. Is this right? How many cycles should you get out of a battery before it starts losing health?

    Here is the information from profiler:

    Charge Information:
    Charge remaining (mAh): 3990
    Fully charged: No
    Charging: No
    Full charge capacity (mAh): 4918
    Health Information:
    Cycle count: 43
    Condition: Good
    Battery Installed: Yes
    Amperage (mA): -1219
    Voltage (mV): 11847

    And here is a screen shot of iStat

    [​IMG]

    Does this sound normal to people, I'm more worried about it dropping a further 1% within half an hour of it dropping the first 1%
     
    Last edited: Feb 9, 2009
  2. Deano_uk

    Deano_uk
    Active Member

    Joined:
    Oct 30, 2004
    Messages:
    233
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    31
    Location:
    Rotherham
    Ratings:
    +26
    Sounds normal to me, when I got my MBP it dropped to 96% after a couple of months but now its 18 Months old it hasn't fallen any further.
     
  3. Shoka

    Shoka
    Well-known Member

    Joined:
    Jan 10, 2002
    Messages:
    4,330
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Surrey
    Ratings:
    +238
    Thanks. Strangely it has gone back up to 99% again within a few hours of it being on. Very strange happenings.

    Thanks for the assurance though, its put me a little more at rest.
     
  4. Tenex

    Tenex
    Well-known Member

    Joined:
    Mar 2, 2003
    Messages:
    7,632
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Ratings:
    +1,063
    Sounds normal - one thing that amazes me about these batteries is how fast they discharge when the MB isn't in use.

    You don't need to run the battery flat every time, about once a month is OK. There's an Apple advisory posted on here and their site to confirm that.
     
  5. tuscan_al

    tuscan_al
    Active Member

    Joined:
    Mar 28, 2008
    Messages:
    255
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    18
    Location:
    Watford
    Ratings:
    +4
    Can you advise me the best way to run my MBP then, ie should i leave it plugged in and that once it reaches 100% my thinking was its charged and then just runs straight from the mains, and not through the battery??
     
  6. Shoka

    Shoka
    Well-known Member

    Joined:
    Jan 10, 2002
    Messages:
    4,330
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Surrey
    Ratings:
    +238
    How Strange - After it running low today and a re-charge it is now quoting 100%, I have a battery that improves with age :D
     
  7. Shoka

    Shoka
    Well-known Member

    Joined:
    Jan 10, 2002
    Messages:
    4,330
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Surrey
    Ratings:
    +238
    I think it uses part mains, but is constantly topping up your battery. It's advisable to not always run it off the mains as after a long period your battery will think it has no life.

    The batteries in Laptops, phones etc have a kind if memory so if you, constantly have it on charge it will think it's life is a lot less than it should be.

    This wont happen over a week or whatever, but worth keeping in mind. I have a Sony Vaio laptop that was constantly on charge over the space of about 2 years, I cant even boot it now without it dying because the battery is done for.
     
  8. Ned Senior

    Ned Senior
    Well-known Member

    Joined:
    Aug 14, 2006
    Messages:
    4,818
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Stalag 9
    Ratings:
    +1,170
    Yeah we have an old Toshiba like that the charge only holds for around 30 minutes But £75 for a new battery on a 5 year old laptop no way doods
     

Share This Page

Loading...