Universal Battery Charger for AA, AAA, C, D, 9V Ni-MH Ni-CD Rechargeable Batteries with Discharge Function. You can charge 4 AA/AAA,C, D,Ni-MH Ni-CD battery together or 2 9V battery together Output – 1.2Volt*4@150mA DC or 9V DC@25mA*2 Input – 240Volt AC Alkaline or carbon battery is not allowed or single charge battery is not allowed.