Features:

• Ni-MH battery, no memory effects!! Holds charge for up to 400 days
• Voltage 14.4V, Compatible with iRobot Roomba 500 series (500 510 530 531 532 533 535 536 540 545 550 552 560 562 570 580 595); iRobot Roomba 610 Professional Series iRobot Roomba R3 (600 620 630 650 660); 700&800 Series (700 760 770 780 790 800 870 880)
• Safeguard features against incorrect voltage, short circuit, internal overheating
• 3.5Ah high capacity allows longer runtime and Easy to install & remove
• 100% QC of this battery and 30 days 100% money back and 1 year warranty. on-time customer service