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I opened up my ipod touch and successfully installed a new digitzer. But after a few hours, the battery died and would not start up no mattery what. itunes wouldn't recognize it, the ipod wouldn't turn on even when I plug it into a wall adapter. Should I replace the battery?

Unless you punctured or bent the battery in the process it is most likely not broken. However one of the wires may have come loose when you moved the battery around. Another possibility is that the iPod touch is just frozen, you can revive it from that state using a hard reset (press menu and sleep/wake button together for 5sec). Did the battery charge reduce over time when the iPod was still running, was the battery almost empty before the iPod turned off? Did the charging indicator come on when you plugged it into the charger and the iPod was still working?

Yes I did...I had this iPod touch since Dec. 07, so is there a possibility that the battery is just too old to hold a charge anymore? I tried all of them, none of it worked. Before, it was working fine, but the charge did seem to reduce over time. One day I plugged it in, and the screen where it shows the amount of battery was completely empty! there was no red at all; when i unplugged at that time, it somehow showed a full charge. I bought a new battery so I'm hoping this one will work.

btw, I DID bend the battery, because I was replacing digitzer and had some trouble getting the glue off the battery. does bending the battery affect its performance??? thanks alot.

bending a battery severly, can reduce the batteries capacity to zero, so replacing the battery is advisable at this point. you will need a soldering iron to complete this repair. remove the glue covering the soldering points where the battery wires join the motherboard. take note of the color coding and be sure to replicate it when you connect the new battery. if you have a voltmeter : the ipod touch has to turn on as soon as your battery reached a charge of 3.7V, otherwise, after trying a few more hard resets, there has to be something wrong with the logic board.

hey thanks alot, I'll try that.

but instead of soldering it, do you think I can cut the old battery off so that the old solder is still there, and then snipe the wires so that I can manually connect/twist together the wires? do you think that would be doable?

everytime i plug my ipod touch in for charging, the front screen where it shows the amount of battery left is completely empty. there is no red section at all. is there something wrong with my battery? thanks.

twisting the wires together will be ok from an electrical perspective but make sure the wires are insulated perfectly so they can't tough each other or the casing. to find out what's wrong with the battery you're gonna need a multimeter (voltmeter) at this point. if the voltage is ok (3.7V) and you're still getting red on the iTouch, it's a logic board issue. If your battery never reaches 3.7V, no matter how long you charge it, it's mostl likely your battery. to see if the charging current even goes into the battery you can do the following. measure the battery voltage when the iPod is unplugged. then plug in the charger, the voltage should go up by like 0.2V instantly when you plug in the charger. if that happens, and you still don't get the battery to 3.7V in the long run, it's definitely a broken battery. if it doesn't go up when plugging in the charger, the battery is either not connected properly or your board is broken, because it doesn't produce a charging current.