Specification :

Battery Type: Ni-mh

Votlage: 14.4V
Capacity: 2.0ah, 2.5ah.3.0ah.3.3ah 3.5ah, 4.2ah, 4.5ah

Max. Discharging rate : 10 C at 24 A
Dimension: 5.7 x 2.2 x 2.5inches

Features and Benefits

APS battery compatible with all 500 series Roomba® FloorVac® models
Charges in 3 hours with ABS charger
Provides up to 100 minutes of run time
50 percent greater useful life than original Roomba batteries

Compatible with the following models:

iRobot Roomba® 510
iRobot Roomba® 530
iRobot Roomba® 535
iRobot Roomba® 540
iRobot Roomba® 550
iRobot Roomba® 560
iRobot Roomba® 570
iRobot Roomba® 580
iRobot Roomba® 610 Professional Series

New improved NiMH battery, ideal replacement battery or extra battery for your iRobot Roomba 500 serie ( e.g.510, 520, 530, 535, 550, 555, 560, 562, 563, 580, 581, etc) and 600 serie. These improved batteries have a capacity of 4500 mAh . The newest batteries of iRobot have only a capacity of 3000 mAh. The batteries here are roughly 40 % more powerful than the newest battery of iRobot, and your Roomba will run significantly longer, and needs less recharging. These 4500 mAh batteries are a new development and will be worldwide the most powerful NiMH batteries available for Roomba. These batteries are high-quality batteries, not produced by iRobot but completely compatible with all iRobot Roomba 500 series cleaning robots.
Clear instructions for replacing the battery are included in the package