GPK systems rechargeable APS 2000 mAh Battery for iRobot Dirt Dog Discover 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). WHAT'S IN THE BOX Advanced Power System (APS) 2000 mAh NiMH Battery *Note: Not compatible with Roomba 500 Series robots. Cleaning area per battery charge varies depending on floor type, room layout, battery age and amount of debris. Battery performance and run time will decrease over the warranty period. Maintaining clean brushes optimizes battery performance. Will fit Irobot Roomba 4270 4280 4290 4300 4310 4320 4210 4220 4230 4240 4250 4260 4905 400 410 419 400 405 410 415 416 418 4000 4905 4100 4110 4120 4125 4130 4210, 4220, Scheduler 4225 4230, 4110, 4225, 4910, 4330 4225 4226 4227 4228 4229 4231 4232 4233 4234 4235 4236 4130, 4260, 4270, 4290, 4150 400 405 410 415 416 418 4000 490 4200 4210 4230 4240 4250 4260 4390 4400 4410 4420 4430 4440