Powerextra 14.4V Replacement Battery for iRobot Scooba 5900 5800 APS 3800mAh Replacement battery, 3.8Ah Capacity, 14.4V made with high quality battery cells High quality, high capacity battery for longer running time.convenient to use No memory effect. Can be charged or discharged as needed without loss of capacity. Made of lead-free SMT process,fit with the requirements of environmental protection 30 Days Money Back or Free Exchange