This rechargeable lithium-ion polymer battery pack is specifically designed to fit in the battery compartment for Nintendo DS Lite. Just unscrew the previous battery from the compartment with the included screwdriver, replace with this battery and screw it back in. The rechargeable lithium-ion polymer battery pack delivers non-stop fun for Nintendo DS Lite. Extra heavy duty 1000mAh rating and easy to install for Nintendo DS Lite. Model: USG-003 Voltage: 3.7V. Capacity: 1000mAh Type: lithium-ion polymer