Voltage: 14.4V

Capacity:3.0Ah

Cell:Ni-Mh

Specification:Rechargeable battery for Roomba 400 Series, Discovery Series, Dirt Dog and original models.
Powers Roomba for up to 120 minutes of continuous clean up.
Use the APS Fast Charger (Item No: 4902) to charge APS Battery in less than 3 hours (the Standard Charger charges the battery in 7 hours).
Keep a second battery on hand to double Roomba's cleaning time