Nokia Lumia 521 User Manual page 33

2. At the top of the phone, put your thumbnail in the seam between the screen frame and the back
cover. Press the middle of the back cover, and bend the cover to loosen the top hooks.
3. Press and bend the bottom part of the back cover to loosen the side hooks, and remove the
cover.
4. Lift the battery out using the notch located at the bottom of the compartment.
5. Slide the memory card out of the compartment.
6. Replace the battery while ensuring the gold contacts are aligned.
7. Replace the back cover.