IBook does not run on battery

My Ibook does not run on battery when it reaches 48%. It just shutsdown with no warnings. I have to connect the AC adapter to work if i disconnect it the ibook just shuts down. I have to waut until it reaches 100% and then i take the AC adapter. I book shuts down and after i turn it on with out the AC and it stays running on bat until the 48%. Then i have to go through everything again.

Jobbaman wrote:
Till now my battery has been working perfectly. The machine is about 1 year old and I use it heavily for my work. I prefer to unplug my battery when it's full, and use it till it go's to sleep before plugging it in again. This results in a very high Cycle count (453) but a still perfectly working battery (98% according to CoconutBattery), I can use the machine for about 4 hours on a full battery.
The amperage would be 0 since your battery is not in a charge cycle.
Part of your problem could honestly be your cycle count and method of caring for your battery. If you check some of the research about Li_ion batteries this is the worse way to use it. Li-Ion batteries work best with little charges. Deep cycling Li-Ion can kill the cells. There is no good reason to charge the battery and then use it as you have been doing. This just kills your battery for no reason. The MacBook is designed to cut the charge off when the battery is full and it does not hurt the battery to lie idle like this. The method you're using can prematurely kill your battery.
Either the battery has a problem that is not showing on you readings or the battery circuit is fried. Do you know someone that has a MacBook or live near an Apple store so you can test your battery on a known good MacBook. Or you could try one of their batteries in it.

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