Work around the corner of the iPod and release the two tabs holding the iPod together near the dock connector.

Free the five tabs holding the iPod together on the other side. You may be able to free the tabs by gently wiggling the front panel of the iPod.

Lift the rear panel away from the iPod.

Lift the battery up from the adhesive holding it to the iPod.

Lay the battery next the the iPod (it is still connected to the logic board).