Gently pry on the small slots on each side near the L and R Buttons. Once the cover begins to separate from the system, continue prying the cover open, moving towards the front of the system. A size #00 crosshead screwdriver will be required to remove the battery from a Nintendo 3DS XL system. Brightness was set to full on each of them, and any wireless communication and 3-D features were turned off. To remove the battery cover, lift it up slightly and slide it away from the bottom of the system. There are two tabs on the underside of cover. Please make sure the tabs do not catch on anything when removing the battery cover, as this may result in damage to the cover. Disabling Wi-Fi on your Nintendo 3DS XL can be done from the Settings. Toggle the Wireless Communication option to the off position.

The (Nearly) Definitive Nintendo Battery Test | WIRED The (Nearly) Definitive Nintendo Battery Test | WIRED

A size #0 crosshead screwdriver will be required to remove the battery from a New Nintendo 3DS XL system. This product uses a lithium-ion battery. Lithium-ion batteries contain potentially reactive chemicals and should be properly recycled.

Disposing of used batteries

Adjust the screen brightness according to your environment. Lowering the brightness to a tolerable level, if you can manage, will have a drastic effect on the battery life.