Powerextra 4500mAh Ni-MH Compatible with iRobot Roomba R3 500, 600, 700, 800 & 900 Series 500 510 530 531 532 535 536 540 550 552 560 570 580 595 600 620 650 660 700 760 770 780 790 800 870 900 980 Battery Type:Ni-MH / Voltage:14.4V / Capacity:4500mAh Fully charge before use (at least 1-2 hours).Higher Capacity 4500mAh,it runs for well 1.5 to 3 hours with no problems after fully charge. Easy install and it fits perfectly.Keep your Roomba cleaning up all the cat hair, cat litter and whatever else was on the floor Brand New Replacement Product, Works as Genuine Parts.Easy to charge and connect APS battery compatible with all Roomba 500&600&700&800 series. Safeguard features against incorrect voltage, short circuit, internal overheating.