Battery for iRobot Roomba 4110 4130 4150 4230 4232 4250 Roomba 4260 model Battery type: Ni-MH; Capacity: 3500mAh 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.