On Sun, 24 Dec 2006, Ed Hill wrote:
Its been a while since I've used APM. For ACPI, the percent typically reported is the "percent of the last full charge" not the "percent of the battery design capacity". Initially, the two percents are about equal. But, over time, most batteries slowly loose the ability to hold charge so the reported percentage is a fraction of an ever-decreasing total.
If I understand you, we both agree. The battery after charging will show 100% and then decrease to 0% (if you let it go that far) as you use it. The change with age is that 100% represents progressively decreasing number of mAh.
I have a (laptop - new battery) pair that shows this behaviour, indicating that the bios (or whatever apm reads) in the laptop is behaving OK. I get about 3hrs out of the battery with apm showing 3% charge left.
With the old battery, the laptop takes about 30mins to get to 73% charge, when the laptop hibernates. I would expect if the battery had reduced capacity, that it would show say 10% in 30mins.
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