Universal Battery Charger, Keenstone Premium Battery Charger 4 Slots

4050mAh irobot replacement battery makes your roomba run longer, which it can runs well for 1.5 to 3 hours per charge.Morpilot iRobot replacement battery compatible with models: 500/600/700/800/900 Series 510, 530, 531, 532, 533, 535, 536, 540, 545, 550, 551, 552, 560, 561, 562, 570, 580, 581, 585, 595, 600, 610, 620, 630, 650, 653, 654, 660, 700, 760, 770, 780, 790, 800, 870, 880, R3, 80501Life Saver, Money Saver! Save money by using a long-life battery (1000 cycle times, 1 long-life battery = 5 NiMH/ 10 NiCd batteries), 4x longer Life than iRobot batteriesNo Memory Effect+Low Rate Of Self-discharge, ultimate protection circuit design. Advanced Long-life technology provides improved energy density.