If anyone can tell me how to fix my Macbook Pro under Windows so it actually looks like I have a battery in the computer, I’d appreciate it. It worked for months, and then one day it just had a big red X over the battery indicator in the tray, and when I mouse over it, I get the message that “No battery is detected.” So now I have no idea how much battery life I have at a given moment, and I don’t trust that I will get warnings if my battery is low, so I’m afraid to use it for more than an hour and a half on battery.

no battery detected

I’ll Paypal you a dollar if you can help me fix this.

Edit: So here was the secret, or at least I think so. I found this quite by accident. I booted into MacOS via Bootcamp, then restarted again into Vista. All seems OK now. Not sure why – I had rebooted Vista a few times and that didn’t help, so some kind of magic OSX battery initialization thing, maybe.

7 Responses to “Macbook Pro battery not detected under Windows”

  1. Scott Cate says:

    Thank you, I knew there was a reason I left the OSX partion on this machine :)

  2. Trevor says:

    Okay, so I don’t have a Macbook, I have a Dell.
    The battery is there… it charges, and the computer runs fine without wall power. But it swears that there is no battery. Any solutions here?

  3. Rob says:

    I have the same problem with my MacBook Pro. I’m running Vista with SP1 RC1 — it showed the battery for a few weeks and was working great, then one day I got the “no battery detected” message.

    Kurt, as a note you can always flip your laptop over, press the button on the battery and the green lights indicate how much juice you have left. If you only see one flashing green light then you should plug it in. I should also note that I have fully drained the battery twice on accident (didn’t realize I was unplugged) and Vista seems to handle it gracefully — I immediatly plugged back in, press the power button and I was back with all my applications still open.

  4. Roland says:

    I had the same issue. Try removing he battery, boot with power cable only then insert the battery. Vista did detect it immediately.

  5. THa Fixer says:

    Ok, here’s the fix for those running only Windows and not MacOS.
    Just follow these instructions on the Apple website to reset the SMC: http://support.apple.com/kb/HT1411

    It worked for me (Windows Vista x64 Business) on a MBP.
    Below the steps to follow (the same as the link above):

    MacBook, MacBook Pro except MacBook Pro (17-inch, Early 2009):
    1. If the computer is on, turn it off.
    2. Disconnect the AC adapter and remove the computer’s battery.
    3. Press and hold the power button for 5 seconds and then release the button.
    4. Reconnect the battery and AC Adapter.
    5. Press the power button to restart the computer

    MacBook Air (Original), MacBook Air (Late 2008) and MacBook Pro (17-inch, Early 2009)
    1. If the computer is on, turn it off by choosing Shutdown from the Apple menu.
    2. Connect the power adapter to a working power source.
    3. On the built-in keyboard, press (left) Shift-Control-Option along with the power button once.
    4. Wait 5 seconds and press the power button to start the computer.

  6. Henrik says:

    Thank you, I thought my battery was dead at first….

  7. Newbs says:

    I just wanted to add my thanks to this, along with some more keywords and phrases to help searchers find this solution. It took me months to stumble across these simple instructions, and they work great! Like many others I completely wiped my MacBook’s HD and so am not able to boot into OSX to fix the “no battery is detected” error in Windows 7 (and XP previously).

    So, for battery errors under Windows on a MacBook, follow these instructions to solve the problem!

    Thanks again!!

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