Battery Trouble?

[eightiesbaby]

Hello, I recently noticed that my battery percentage increases than decreases a lot and within a short period of time... maybe even a minute.
1 minute it will say I have 4:17 left, and the next it will be 4:02... then it will go up to 4:22 etc.. etc..

Could there be something wrong with the battery or is it just changing after I do something.. for example.. if I open up Itunes and start listening to music.. it will be lower.. and when i shut it down.. it will go back up again?

Also, I've heard you should calibrate the battery every month or so... but I don't really understand how you do it.

Thanks!

 

[albion-bh]

yes it's like average miles per gallon. If you go down hill it can go to 200+ miles per gallon . . .but hill soon ends the same if you go up hil - it goes down.

So yes on usage.

Not sure about battery "calibration"

 

[r.j.s]

Calibrate your battery here.

 

[DeusInvictus7]

Yeah, basically that time display on the battery just shows an estimate, based on what you are doing, and based on CPU usage, screen brightness, everything that has a factor in determining battery life...it will fluctuate a lot.