This rechargeable lithium-ion battery pack is specifically designed to fit in the Nintendo DSi XL battery compartment. To connect just unscrew the previous battery from the compartment with the included screwdriver, replace with this battery, close with the included battery cover and screw in the thin connecting tab. Package includes: 1 Li-ion rechargeable battery, screwdriver, battery cover, connecting tab. 1600 mAh capacity.