As you can see this battery is defective and needs to be replaced.
Begin by removing the shielding foil taped over the top of the hard drive.
Step 14
Pry up the Zune hard drive using the opening tool.
Step 15
Lift up the hard drive and pay attention to the ribbon cable at the bottom of the hard drive. It is extremely sensitive. Make sure the cable does not get punctured or dented.
Step 16
Peel off the shielding foil over the audio jack ribbon cable and battery cable. Don't tear it or damage it, it needs to be re-applied upon reassembly. In General: be very careful with the shielding foil on all components, if it is not reapplied correctly it can keep the Zune from powering up properly after reassembly.
Step 18
Use the opening tool as a lever to pry the Zune Battery loose from the double sided tape on it's bottom.
Step 19
In the image you see how the battery is soldered to the zune logic board. Use a soldering iron to disconnect the defective battery.
Step 20
Connect the new battery to the solder pads using the same color coding as the original battery.
For reassembly follow the steps in reverse order. Remember to reapply all aluminum shielding foil.
