I book shutting off at 50% battery

help! my ibook is shutting off at 50% battery. When it did it this morning I pushed the battery button and 2 dots lit up so I don't know what is going on. I don't get the reserve battery warning or anything, just blip, shuts down. Then when i turn it on it tells me my computer has a date set in the past or something. Is there anything I can do? Thanks.

Hi battricia,
I think that you may find that your battery has reached the end of its life. To get more info about your battery, go to the Apple menu>About this Mac>More Info and select Power. Scroll down to Battery Information and select, copy and paste the info into a new post. Given that a new battery starts at 4400 mAh (milli-amp hours) you should get some idea from the present Full Charge Capacity just how far down the road your battery is.
You might want to check Here to see if you qualify for a free replacement battery under the Battery Exchange Program.
Good luck and post back with the Battery Information.
Adrian

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