when you start to notice that it cannot hold a charge, even on lowest brightness, low volume, no games, etc. Sadly, it is highly unrecommended to replace it yourself, and apple replaces it for about $80
To replace an iPod touch battery you would have to send it out to Apple inc.
maybe is time for you to get your battery replaced
The iPod Touch will eventually run out of battery when it is locked, but it will not drain instantly.
If "dead" means that the iPod Touch's battery ran low or has been used up completely, use your Apple charger to charge it. When it has fully charged, press the power button, and your iPod Touch should be working again. If you always had full battery or high battery, or you have tried the above method but your iPod Touch still doesn't work, try resetting it. If that doesn't work, your iPod Touch may truly be "dead".
Your iPod should be switched on. If the battery is completely dead then plug it in to charge and it will automatically switch on when it has enough charge.
2-3 hours
No
No. However, there are apps that can tell you your iPod's battery life percentage.
You can't replace the battery
You cant replace the battery.
If it is frozen then you should just leave it until the battery dies. Then, charge it and it should work fine.
if it is fully charged 7-10 hours