What the... my laptop battery LIES!
I have a weird problem with my years-old netbook, an amd-based acer aspire 1
everyones seen batteries that get down to 50% or last ten minutes off the charger and then their laptop dies, but I have the opposite problem
if I override/ignore the "critical battery 5% your gonna die soon!" warning (that I get within an hour of taking it off charge), it runs for AT LEAST (I haven't managed to run it till dead yet) another hour and a half!
ive reinstalled windows (7/32) since I remember reading somewhere that windows "calibrates" itself to the battery so it can tell you if your battery is losing capacity and/or take decent guesses on what battery level it should kick it into hibernate, etc
but it still says "consider replacing your battery" and still sleeps my laptop (it cant hibernate cos my widnows is in a vhd) with well over an hour of runtime to go
I went and poked deeper. fired up cupid hwmonitor and took a look at my battery stats: its design capacity is about 47 watt-hours, but it says the capacity is only 15wh (degradation of 70%). current charge says 15wh and when unplugged, drops like a rock for an hour to 0.91wh when it hits critical battery and sleeps
wake it up - yep, 910mwh, 5% charge remaining
run for half-an-hour - still at 910mwh, 5%
watch an 720p episode of something for 3/4 of an hour (hard work for a 1ghz fusion - both cores at 100%, cpu temp 85 degrees) - STILL at 910mwh, 5%
only clue that im hurting the battery is that the terminal voltage (normally 11.1v) has sagged to about 10.9 in the last hour and a bit since it "died"
has anyone else seen this before? and more importantly did you find a way around it?
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