Battery is showing negative amperage

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Level 1

31 points

Battery is showing negative amperage

I have a 6 week old (via coconutbattery, bought 3 weeks ago) Macbook 2.0 which is showing a negative amperage of -1638 via About This Mac (Power). It is showing this while running on battery power. I've read a negative amperage is normal when charging. Should this be happening? I also have a 95% battery health (capacity) shown with both coconutbattery and About This Mac after 10 charges. I've done a battery calibration via Apple instructions. Any info would be appreciated. Thanks.

Sam

Macbook 2.0 CoreDuo2, Mac OS X (10.4.10)

Posted on Sep 18, 2007 10:17 AM

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Answer 1

fuji_apple Author

Level 1

31 points

Sep 18, 2007 10:38 AM in response to fuji_apple

I found the information about negative amperages for anyone interested. The amperage field in About This Mac shows the directional flow of power into or out of the battery, meaning when power is flowing out (battery is being used) it shows a negative number, when power is flowing in (battery is charging) it shows positive and when fully charged should show 0.

I'm still a little bit worried about my 95% after 10 recharge cycles but won't sweat it until I see a demonstrable drop in battery performance or the meter drops down into the low 90s. Love my Macbook but I've never had to give my other umteenth laptop batteries a second thought or calibrations - kind of a pain in the kabuse.

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