[habibman]

Hello everyone. Alright, just got my pretty much DOA powerbook back from the apple store recently. They even put in a new battery for me, yay! Well, i charged the battery to 100% the first day I got it back, and then i calibrated it (let it drain completely till it died). I actually have done that 2-3 times, but aside from that first time, I have never gotten the battery to go up to 100%. Am I forever doomed to have my battery go up tp 99%? Does anyone know why this may have happened? The AC charge light indicates a full charge, showing me a delightful green, but it is is it really full if it isn't at 100%? Any help would be appreciated, thanks.

[ghettochild]

AFAIK this has been discussed numerous times here. no worries, your battery is fully charged and good to go.

[Maflynn]

That's just a small reporting inaccuracy. At times before running on my battery I've seen it 97% but not get recharged. Once I ran it down and recharged it, the thing went back to the normal 99%.

Just one of lifes little annoyances

[pcummins]

If you check in Terminal* with "ioreg -l | grep -i battery" you should see something like IOBatteryInfo with Capacity, Cycle Count, Current and Absolute Maximum Capacity. Basically the % seems to be calculated from Current/Capacity and rounded down, and most Apple laptops lose a few points shortly after charging (about 15-30 mins, from memory...) which causes the 99%. Only if it's Capacity = Current do you get 100%. Shouldn't be anything to worry about, the PowerBooks only charge if they drop below 95%.

* You need to drag the Terminal window wider to see this, however.

[Eriamjh]

You can also use XBattery to track important battery characteristics. Nice tool.