OSTENT 840mAh Rechargeable Lithium ion Battery + Tool Pen Pack Kit for Nintendo DSi NDSi

Extra heavy duty 840mAh rating and easy to install in your system for NDSi. This rechargeable lithium-ion battery pack is specifically designed to fit in the battery compartment for Nintendo DSi. To connect just unscrew the previous battery from the compartment with the included screwdriver, replace with this battery and screw it back in. The battery delivers up to twenty hours of non-stop fun on your system for NDSi. Compatible with: Nintendo DSi NDSi only; Voltage: 3.7V; Capacity: 840mAh