Review on 🔋 14.4V 4.5Ah Replacement Battery Compatible with Roomba R3 Series 500-900 - Fits Models: 500, 510, 530, 531, 532, 535, 536, 540, 550, 552, 560, 570, 580, 595, 600, 620, 650, 660, 700, 760, 770, 780, 790, 870, 880, 980 by Becky Evans

Urgently needed. The original batter was on its last legs. One thing I noticed is that the alternate batter is a lot lighter. It doesn't have a plastic case like the original. As far as battery life goes, so far so good. Edit 4/6/21 The battery lasts about 50 minutes before it dies. We are expected to use our Roomba for at least an hour every day. Sometimes it is used 2-3 times a day. Given that this is a LIMH battery and not a Li-OH battery, it doesn't matter that it lasted almost a year and a half. The original lasted almost 4 years. May look for Li-OH as a replacement.