Battery for iRobot Roomba FloorVac 400 Series APS 4905 Tenergy 11701 11709 Battery type: Ni-Cd; Capacity: 2500mAh Voltage: 14.4 V Compatible with: iRobot APS 4905 / Tenergy 11701 / Tenergy 11709 Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Revitalize your iRobot Vacuum cleaner by replacing the old battery with our Brand replacement battery. Lower Price than Original OEM iRobot Battery - save money without paying for the "i-Robot" Brand Name.