Time To Charge MBP Battery?

Discussion in 'MacBook Pro' started by czeluff, Jan 16, 2007.

  1. czeluff macrumors 6502

    Joined:
    Oct 23, 2006
    #1
    hello to all,

    it takes my MBP 5 hrs to chrage the battery all the way. Is this typical? That seems like a long amount of time.

    cz
     
  2. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #2
    From a depleted state, it should take about 2 hours to charge up to about 80% in fast charge mode, and then an additional two hours to top off using trickle charge mode. Read more here.
     
  3. czeluff thread starter macrumors 6502

    Joined:
    Oct 23, 2006
    #3
    yea

    yea, it seemed like it still took about 4 hrs to do the initial 80%. should i take it in for someone to look at? or do u think that 20%/hr is good enough?

    cz
     
  4. adrianblaine macrumors 65816

    adrianblaine

    Joined:
    Oct 12, 2006
    Location:
    Pasadena, CA
    #4
    It always "seems" like a long time though. Were you using it while it was charging? That always will take longer as well.
     
  5. e12a macrumors 68000

    e12a

    Joined:
    Oct 28, 2006
    #5
    How did you discharge the battery in the first place? How old is your battery? Did you calibrate?

    -Enough to force sleep?


    Did you turn the computer back on even after forced sleep? I'm not sure if this is possible, but

    I was reading up on li-ion batteries that if they are discharged beyond a certain threshold, they may go into something called "Deep discharge", where it may take significantly longer to charge a battery. it is also unsafe to charge a Li-Ion battery once it's beyond the threshold. Occasionally, the battery's safety mechanisms will activate rendering the battery useless (irreversible).
     

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