Compatible with:Adedad Charger Model BC-AD2001 20V 20VDC Power Supply Note:Rechargeable batteries typically last 1 to 3 years. If a battery is old or depleted, it may not charge, but this isn't necessarily the charger's fault. To determine if the charger is working, use a voltmeter. Connectivity technology: Powerline Input voltage: 110.0 volts_of_alternating_current Connector gender: Male-to-Female Connector type: 2-Pin Special feature: High Quality saschedross AC Adapter Replacement For Adedad DR21-2 DR21 DR212 Cordless Drill Set Electric Power Drill Kit Lithium-ion Batteries BC-AD2001 2000mAh 20VDC Power Supply Mains PSU