How to Install or Change the Batteries in a Nintendo 3DS NFC Reader/Writer
Nintendo 3DS
In this article, you'll learn how to install batteries into the Nintendo 3DS NFC Reader/Writer.
Note: The Nintendo 3DS NFC Reader/Writer uses two AA alkaline batteries.
Complete these steps
- Remove the battery cover from the Nintendo NFC Reader/Writer.

- Insert two AA batteries, using the positive (+) and negative (-) guides in the Nintendo NFC Reader/Writer battery compartment. Be sure to insert the negative (-) end first.
- If replacing the batteries, remove the positive (+) end first.

- Replace the battery cover by inserting the edge with the two tabs first and then press the cover into its recess until it clicks into place.