IPod touch incorrect battery indicator?

Question

I've had my iTouch for almost 2 years, and last year I realized that the battery indicator is incorrect. if i use my ipod 2 hours straight the battery would be competely drained and it'd turn off. but if i turn it on in 15 mins the battery would be up to 40% . plus when im using it i notice that the battery bar goes down quickly but if i leave it, it increases. its obvious that the indicator is incorrect and i think this is some sort of malfunction because almost all of my friends have the same problem, is there anyway i could fix this WITHOUT replacing my battery?
Thanks in advance :)

Answer 1

You have two separate issues.
Inaccuracy of the indicator, and the fact that it indicator rises to a higher level after you leave it turned off.
The battery runs down after just two hours.
   1.  Are we to assume that when you mention the percentage figure, you are approximating, because as lllaass has mentioned, the iPod does not have a percentage indicator? Any such indication will be from an App, and it should not be regarded as accurate. Even the Apple indicator is just that - an indication.
Regardless of that, to understand why the indicator is higher after leaving the iPod turned off for a while, imagine you go for a fast run. Eventually, you will run out of puff and stop running. At that point, you need to rest for a while, after which you will be able to run a bit further. Eventually, you will have to stop once again, until you recover your breath. Each time you start running again, you will run less distance before running out of energy. A battery is just like that. You use it, it runs out of energy. You turn the iPod off and the therefore stop using the battery and it will recover - a bit. When you start using the battery once again, it will not be long before it runs down again. Eventually, it will have no energy left - until you feed it.
So that behaviour from your battery is normal.
   2.  The length of time you use the iPod (and battery) before it runs down. You haven't mentioned whether you fully charged the battery before deciding that two hours was its maximum run time. So the obvious question is: did you fully charge it before running this experiment? If not, the result is of no use at all.
However, even if you fully charge the battery and then assess it's running time, it really depends on what you are doing and how the iPod is set.
If you're playing an online game (so the screen is permanently on and you are using the Wi-Fi connection all the time), that will run the battery down much faster than if you start some music (that's on the iPod) playing, and then let the screen turn off while it plays. In other words, having the screen on will drain the battery at a faster rate.
Even if you are simply playing music, if you have the screen on while listening, either because you have set the "screen off" time for a long period, or because you listen to the music while you browse your other music, or browse online etc. etc., then once again, that will run the battery down at a much faster rate.
If you only part-charge the battery before using it again, it will not last as long as if you fully charge it.