Repairs Universe demonstrates how to replace the battery on a Microsoft Zune HD. First, use a tri-ring screwdriver to remove the four screws on the back of the Zune. Then, remove the back cover. Next, remove the bottom cover by using your fingers to gently push it off. Then, use a T-5 screwdriver to remove the four screws on the back of the Zune. Release three ribbon cables from their pop connections with a safe pry tool. Use the pry tool to also release the battery from the Zune. Lift the motherboard from the Zune and use a soldering iron to remove the old battery's wires from the board. Install the new battery by re-soldering the connections.