7 Replies Latest reply: Oct 25, 2009 7:23 AM by Melamela
stubby Level 1 Level 1 (0 points)
2007 White MacBook shuts off (not shutdown) when power cord is removed. Battery shows 98% charge. Any ideas? I plug AC power back in and it reboots when start button pushed. This problem just started tonight.

HELP!

MacBook, Mac OS X (10.5.7)
  • hotel6 Level 1 Level 1 (0 points)
    I also have the same vintage Macbook. Laptop has been sitting on desk for two weeks, not plugged in and was turned off. Came back on Sunday and discovered the same problem. Have run disk utility several times and have updated software as well as the battery update. Still have the problem.
  • JoeyR Level 6 Level 6 (8,275 points)
    You may want to try resetting your machines SMC... this can sometimes help with battery/power related issues:

    http://support.apple.com/kb/HT1411

    Be sure to follow the instructions for your specific machine as they vary from model to model.

    If you click on the Apple logo on the top left of your display, select "About this Mac" and then "More Information". On the left column, select "Power". On the right column, copy the information pertaining to your battery (cycles, health, etc) and post it here so we can tell if there is a problem with your battery.
  • Ronan Daly Level 1 Level 1 (0 points)
    Hi there, I am a bit of a novice when ti comes to things like this but my battery is refusing to charge. any tips guys? here is the info you described:

    Battery Information:

    Model Information:
    Serial Number: DP-ASMB016-3768-116e
    Manufacturer: DP
    Device name: ASMB016
    Pack Lot Code: 0002
    PCB Lot Code: 0000
    Firmware Version: 0110
    Hardware Revision: 0500
    Cell Revision: 0102
    Charge Information:
    Charge remaining (mAh): 0
    Fully charged: No
    Charging: No
    Full charge capacity (mAh): 0
    Health Information:
    Cycle count: 627
    Condition: Check battery
    Battery Installed: Yes
    Amperage (mA): 0
    Voltage (mV): 8147
  • JoeyR Level 6 Level 6 (8,275 points)
    Ronan... in your case, it looks like it's just time for a new battery. Your battery should hold a full charge for up to about 300 cycles. At that point, you should expect a decline in the charge capacity. As your battery has over 600 cycles, it sounds like it's had a good life. As you've had your MacBook for less than two years, it sounds like you are possibly using more cycles than necessary. You should try to use your MacBook while plugged in the majority of the time... but occasionally use it on battery (going through one or two cycles a week). A full cycle is a full charge and discharge. For example, if your battery is at 100% and you let it discharge to 90% and then you charge it back up to 100%, that is 1/10th of a cycle. You would need to do that 10 times to equal one cycle. If you started at 100% and let your battery discharge to 50% and then charged it up to full, that would be 1/2 cycle... doing this twice would equal one cycle. The number of cycles is the primary indicator of the life of your battery. It sounds like you are using your MacBook mostly on battery (with over 600 cycles in less than two years). After you replace your battery, try to run it plugged in for the majority of the time if possible. Many people are mistakenly under the impression that they should fully discharge their battery before charging it. This is not the case with Lithium Ion/Polymer batteries. This was the case with Nickel Cadmium or Nickel Metal Hydride batteries (much older rechargeable battery technologies). It seems many people still feel that the memory effect of the older battery technologies applies to newer battery technologies. Just the opposite is true.
  • Muhajir Level 1 Level 1 (5 points)
    yeah dude, time for a new battery. your charge cycle count is that of the apple 300 cycle battery warranty. if you look, it says you have 0 mAh storage capacity, which means it can't store energy anymore.
  • stubby Level 1 Level 1 (0 points)
    Thanks to all who responded. i took the machine to my locale Apple Store at Eastview Mall and it was determined that the battery was indeed the problem. New battery installed and all is well.
  • Melamela Level 1 Level 1 (0 points)
    Hi there!

    We're facing the same problem it seems.
    Battery is fully charged but as soon as we disconnect the power cable the macbook shuts down immediately (screen goes black 3sec after disconnecting the cable).

    Here's the system information:

    Ajustes de alimentación del sistema:

    Corriente CA:
    Temporizador de reposo del sistema (en minutos): 10
    Temporizador de reposo del disco (en minutos): 10
    Mostrar temporizador de reposo (en minutos): 5
    Reinicio automático en caso de corte de alimentación: No
    Activar al cambiar el modo de alimentación: No
    Activar al abrir la pantalla: Sí
    Activar al acceder a la red local: Sí
    El reposo de la pantalla utiliza atenuación: Sí
    Carga de la batería:
    Temporizador de reposo del sistema (en minutos): 14
    Temporizador de reposo del disco (en minutos): 10
    Mostrar temporizador de reposo (en minutos): 7
    Activar al cambiar el modo de alimentación: No
    Activar al abrir la pantalla: Sí
    El reposo de la pantalla utiliza atenuación: Sí
    Reducir brillo: Sí

    Información de la batería:

    Batería instalada: Sí
    Primer aviso de nivel de batería bajo: No
    Capacidad de plena carga (mAh): 3659
    Capacidad restante (mAh): 3624
    Amperaje (mA): 0
    Voltaje (mV): 12510
    Número de ciclos: 325

    Información del cargador CA:

    Conectado: Sí
    Cargando: No

    Configuración del hardware:

    SAI instalado: No


    Please let us know your suggestions!
    Thanks a lot in advance!