... 14.4V 3300mAh NiMH battery replacement battery for irobot Roomba400 series 1. Nominal capacity: 3300mAh2. Nominal voltage : 14.4V3 ... APS battery charger Compatible with both Roomba 400/4000 Series including Roomba Original, Roomba Pro, Roomba Pro Elite, ... for iRobot Roomba 400 Series, Discovery Series and Original models.Compatible with iRobot Roomba 400 Series, Discovery Series and Original models. ...