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Software :: Laptop Shuts Down When The Battery Is At 35% With No Warning?

Laptop shuts down when the battery is at 35% with no warning! Any idea of what to do?

View 3 Replies (Posted: Dec 1, 2008)

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For example, I may start at battery = 100%, and at 20% the laptop shuts off, as I am using (not going into sleep mode due to un-use). The battery seems to go down really fast compared to what it used to be.

Battery Information:
Model Information:
Serial Number:9G84603EF3NYB
Device name:bq20z951
Pack Lot Code:0000
PCB Lot Code:0000
Firmware Version:002a
Hardware Revision:0005
Cell Revision:0100
Charge Information:
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Fully charged:Yes
Full charge capacity (mAh):2079
Health Information:
Cycle count:158
Condition:Check Battery
Battery Installed:Yes
Amperage (mA):192
Voltage (mV):12563

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Posted: Oct 6, 2010

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I have done all those PMU resetting stuff. The problem is that my iBook (1GHz, 768MB RAM, Tiger 10.4.3) keeps shutting off when I run it on battery. While plugged in there doesn't seem to be a problem. Here's what I've found out: This seems to happen only when I run the iBook from the battery. There is no pattern as to when it will happen: It might be fully charged, at 70%, 50%, etc. There are no warnings: The iBook just dies

To restart it I have to plug in the charger, I can't start it from the battery after one of these sudden deaths

If I press the battery indicator after a crash, it doesn't show any charge - no green lights
When I restart the machine the battery indicator will work, and it show's a charge in Tiger as well

I've done all that PMU resetting, PRAM resetting, etc. Doesn't work. Any ideas as to what this could be? Bad battery?

One more thing: I've run the hardware test, and it doesn't come up with anything at all.

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Is it strange that my MacBook now just shuts down when it runs out of battery instead of just going into sleep mode? It's about two weeks old now. It used to go into sleep mode, but now it just shuts down once the battery is down. Also, I had the most wonderful experience with Apple. My first macbook (three weeks ago) had a small chip on the screen. When I finally noticed it, I thought it was a large piece of dust so it wasn't too terrible. I tried to exchange it at the local store where I purchased it, but it had already been four days and I had cut out the UPC for the printer and ipod rebate the day before and sent it out. So they recommended that I go see a mac genius and see if I can get the screen replaced because I could no longer exchange it or return it (risk losing my rebates).

So, a bit upset that I was too prompt about getting the rebates in, I scheduled an appointment with a genius. When I spoke to him, he just went to the back and got the manager. The manager said instead fixing the screen, he'd liked to give me a new macbook and instant reimbursement for the ipod and printer! (the rebates I sent in will be rejected since the mac has been returned). The new macbook I noticed has a much louder superdrive seems to be working hard every time the computer wakes up and when I open it, but that definitely beats a chip on the screen. But now it doesn't go to sleep after the battery gets low, but instead shuts off.

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