102% battery life?

ok, so this is a weird one. so i was running atitools to try and find max clocks for my card, and of course, it messes up the screen, so i gotta do a hard reboot. i reboot, and before windows can actually load, i get a message saying that "windows cant detect ac power", which is weird because i know the cord was plugged in. and ive never gotten that message before, and even if my ac came unplugged, i have 100% battery anyways, so it should boot fine. so i have a variety of options, and one of them was to go into bios (which it wasnt called bios btw), so i went there thinking thats what i wanted. well, saw it was bios, checked the battery, and it said it was 100%, so i exit and shut down.
when the computer actually gets into windows, i check my battery icon (via notebook hardware control), and it says i have 102% battery

any ideas? should i reboot again? should i be happy? should i be worried?

 

well, i restarted, and now i only have 97% battery when i unplug it, and i still ahve 102% when its plugged in. also, when i look at my tray (notebook hardware control), it wont say 102%, it says 10.... should i contact dell? ive only had this computer for 4 weeks

 

It says charge RATE not how full your battery is.

 

it still tells me how much life i have left. i took that as soon as i unplugged it from the wall

 

Calibrate your battery and you'll be fine with 100%.

 

NHC can make mistakes. Turn it off and start it again - it will show the correct value.

Ivan

 

that didnt do anything. still says 102% when plugged in, and both NHC, and windows says im not getting my full time (which should be around 5-6 hours). they both keep jumping around in time remaining

how do i calibrate it?

 

To recalibrate the battery meter, set Windows to "Do Nothing" when you have critical battery, unplug your notebook and do something intensive until your battery drains completely and your computer shuts off, ignoring all Windows messages of your machine's impending shutdown. Then, leave your computer off, plug it in, and fully charge the battery before rebooting.

 

mmkay, ill try that now

 

its all about a calculation...thats it. The battery life display isnt accurate at all so dont expect perfection.

 

but its been pretty accurate up til now. even battery eater says it

 

Post a pic of the battery info from NHC or BEP? The % charge is calculated based on the 'Full Capacity' that the battery reports.

What probably happened is the battery's built in meter recorded a drop in battery capacity (increase in battery wear). For whatever reason, this drop of capacity recovered in subsequent charges.

Take a look at what my battery meter currently says! lol, 135% charge. My actual wear level should be 57%, not the 68% NHC calculates.

 

well, i just calibrated, but it went up! haha, oh well. i give up. after seeing lazy's picture, i guess its somewhat normal

 

Strange... Maybe it is repairing itself and building a new cell inside! It is alive!

Cheers,

Ivan

 

Actually, it means your battery has some wear rate. It will never go down!!! NHC when fully charged divides the designed capacity of your battery between the actual capacity. In your case, your battery is designed to hold about 30W but since it has some wear rate, it'll hold only 22 W. 30/22=136%. NHC will always do this, it will never recalibrate to say a 100%, it will recalibrate though to more accurately tell you how much wear rate you have, but I think it's better to be left out on the blue since everytime you leave the battery to fully discharge, you're actually hurting it more. This is pretty much normal.

 

Actually, my battery was originally 69Wh (14.8v x 4800mAh on the label), it's only been 10 months and it's lost ~60% capacity. Just haven't had the time to contact my reseller or Asus to see about getting a replacement.

The previous pic shows 135% charge because it managed to recover some of the battery wear somehow as i did a discharge to recalibrate and test how long it could actually last on battery now. I hadn't rebooted the system to reset the battery meter to where "100%" should be.