Powerextra 2 Pack 14.4V 3800mAh Ni-MH Replacement Battery Compatible iRobot Roomba 400 Series 400 405 410 415 416 418 4000 4100 4105 4110 4130 4150 4170 4188 4210 4220 4225 4230 4232 4260 4296 Brand New | Ni-MH | 14.4 Volts | 3800 mAh | Yellow Replacement Battery , 100% Compatible with original manufacturer equipments, guaranteed batteries are made with the highest quality materials This package includes 2 batteries 30 days money back and 12 month limited warranty