Specifications High-concerned chemical:None Set Type:Batteries Only Type:Li-Ion Nominal Capacity:5000mAh Model Number:for iRobot Brand Name:bonacell Origin:Mainland China Certification:CE,FCC,RoHS Origin:Mainland China Nominal Capacity:>3500mAh Model Number:For iRobot Type:NI-MH Replacement:Yes Voltage:14.4V Compatible with:For Roomba 500 600 700 800 Warranty:5 years warranty Specification Model: for Roomba 500 Voltage: 14.4 V Capacity: 5000 mAh Size: 136.5cm*46cm*45cm Compatible with the following models: ( please use " Ctrl + F ) iRobot Roomba 510 iRobot Roomba 551 iRobot Roomba 600 iRobot iRobot Roomba 621 iRobot Roomba 760 iRobot Roomba 530 iRobot Roomba 552 iRobot Roomba 528 iRobot Roomba 610 iRobot Roomba 770 iRobot Roomba 531 iRobot Roomba 761 iRobot Roomba 560 iRobot Roomba 620 iRobot Roomba 780 iRobot Roomba 861 iRobot Roomba 532 iRobot Roomba 561 iRobot Roomba 630 iRobot Roomba 860 iRobot Roomba 790 iRobot Roomba 533 iRobot Roomba 562 iRobot Roomba 980 iRobot Roomba 650 iRobot Roomba 800 iRobot Roomba 535 iRobot Roomba 970 iRobot Roomba 570 iRobot Roomba 653 iRobot Roomba 870 iRobot Roomba 960 iRobot Roomba 536 iRobot Roomba 580 iRobot Roomba 654 iRobot Roomba 880 iRobot Roomba 540 iRobot Roomba 581 iRobot Roomba 655 iRobot Roomba R3 iRobot Roomba 545 iRobot Roomba 585 iRobot Roomba 660 iRobot Roomba 805 iRobot Roomba 550 iRobot Roomba 595 iRobot Roomba 700 iRobot Roomba Pet Series Battery Advantages: 1.BEST PERFORMANCE and PERFECT COMPATIBILITY: Fully compatible with the charger and vacuum cleaner.It's easy to install . 2.TRUSTWORTHY RELIABILITY: No memory effect,Low rate of self-discharge (1% per month) .Patented battery balancing technology, Built-in over protection circuits provide safety and reliability from fire and explosion. 3.GREAT SAFETY: Quality Li-ion battery cells with CE and UL approval.It imports from Japan,quality guaranteed. 4.Advanced Li-Ion technology provides improved energy density. 5.STRONG WARRANTY: 7 days money back,1 year limited seller's guarantee against manufacturer defects from purchase date.