Over the lifetime of an iPod, the battery condition will deteriorate. Replacing the battery is the only way to extend playback time of the device to as it was when new.
The iPod Touch 4th generation shipped with a 3.7v 930mAh battery, our OEM replacement batteries meet the same specifications and are the highest quality available.
Batteries in the Touch 4 are soldered to the logic board, when installing a replacement one you must be careful not to cause damage to the board. We recommend professional installation and can perform this repair for you, contact us for more information.