Replacing the battery in a DexCom receiver is a straightforward process. First, it is essential to ensure that the receiver is powered off before beginning the battery replacement. Once powered off, locate the battery compartment on the back of the receiver. You will typically need a small screwdriver to remove the screws securing the compartment cover. After the screws are removed, gently lift off the cover to access the battery. Carefully take out the old battery, noting its orientation, as the replacement must be installed in the same manner. Insert the new battery, ensuring it is firmly seated. Once the new battery is in place, replace the compartment cover and securely fasten it with the screws. Finally, turn on the receiver to verify that it powers up correctly. For specific details regarding your receiver model, it may be helpful to consult the user manual or refer to the current DexCom webpage for guidance.