$2.99 for Hyperkin Nintendo 3DS Power-Plus Battery ($19.99 List Price)

The slim, black power-plus battery slides easily onto your Nintendo 3DS to deliver up to six additional hours of play. A battery-indicator light helps you monitor your battery life to ensure your gaming system doesn't shut off mid-battle.

Product number: M05814
Adds additional 1800 mAH battery power
Slides easily onto Nintendo 3DS
Up to six additional hours of making your Sim walk into a wall
Battery-life indicator light
Condition: New
Dimensions: 8” x 5” x 1.25”