<br><b>NASTIMA’s Advantage:</b> <br>NASTIMA 14.4V 4400mAh Lithium Battery Long-life 1000 cycles is fully compatible with iRobot Roomba Cleaner 500, 600, 700, 800 Series Vacuum Cleaner. <br>The extremely high capacity 4400mAh supply 5X life time vs OEM NI-MH 2200mAh battery. It remains at 80% capacity after 1000 charge cycles. <br><br><b>Features and Benefits:</b> <br>-Ultra high capacity and long life cycles: 14.4v 4400mAh Li-ion battery Lasts 5x times Longer than original 3000mAh replacement batteries / Provides nearly 1000 Charge Cycles instead of original 200. <br>-The first lithium battery for iRobot Roomba: Longer operating time and battery life! 4400 mAH vs original battery's 3200mAh (80~110 min vs. 50~70 min running time), Replacement for iRobot Roomba 500, 600, 700, 800 Series. <br>-Patented battery balancing technology: Built-in over protection circuits (Over-charge ,Over-discharge ,Over-current，Short circuit provide safety and reliability, quality guaranteed! <br>-Long cycles and save money: Li-ion battery can last 2 years for daily usage: recommended sales price $40/1000 cycles= $0.04/cycle. <br>-Risk-free guarantee: You will be 100% satisfied or we'll give you 30 days money back ,1 year Warranty. <br><br><b>Compatible with:</b> <br>Compatible with all Roomba series 500, 510, 530, 531, 532, 533, 535, 536, 537, 550, 551, 560, 561, 562, 563, 564, 570, 571, 577, 578, 580, 600, 610, 611, 620, 630, 640, 650, 655, 671, 675, 700, 760, 770, 780, 790, 800, 805, 850, 870, 880. <br><br><b>Technical Specification:</b> <br>-Chemistry: Li-ion <br>-Voltage: 14.4V <br>-Capacity: 4400mAh/63.36Wh <br>-Color: Green <br>-Net Weight: 518g <br>-Package Dimension: 138*53.9*48.5mm <br><br><b>What you get:</b> <br>1*NASTIMA 4400mAh 14.4v Lithium-ion Battery <br>1*User manual