Advantage Powerextra™ products are made with the highest quality materials.Our products are CE certified, tested by manufacturer to match and/or exceed specifications of OEM products. Powerextra™ focus on providing quality power products and excellent customer service,Looking forward to your support and your positive affirmation. This Battery Perfectly Match Your Battery for iRobot Roomba APS 4905 400 series Vacumm Cleaner with practical price and high quality This Replacement Battery is Designed for for iRobot Roomba APS 4905 400 series,It is a kind of Ni-MH Recharageable battery,you can carry it anywhere anytime, convenient to use.And it"s has no memory effect. Can be charged or discharged as needed without loss of capacity. The functions are the same as the original iRobot Roomba battery Product Detials: Battery Capacity: 3.5AH Battery Voltage: 14.4 V Battery Type: Ni-MH Color:Yellow Compatible with the following models: Discovery Series Create Models Dirt Dog® Model iRobot® Roomba® 400 Series (some example compatible models):400 405 410 415 416 4184000 4100 4105 4110 4130 4150 4170 41884210 4220 4225 4230 4232 4260 4296 Warranty : We guarantee to provide brand new high quality replacement batteries with REAL SPECIFICATIONS All products come with our wondershop is 30 days money back 12 months seller"s guarantee against manufacturer defects from date of purchase,and 24 Hours friendly customer service! YOU ARE WORTH IT !!