Review on 🔋 Firstpower 5.0Ah 14.4V Roomba Battery Replacement R3 Compatible with 500 600 700 800 900 Series 510 530 531 532 535 536 540 550 552 560 570 580 595 620 650 660 760 770 780 790 800 870 by Amanda Anderson

UPDATE: Seller emailed me and sent me a replacement battery. I've been using this pack for three days now and it's working as expected - around 80 minutes on a single charge. Apparently the first battery sent was defective. ORIGINAL REVIEW: I bought this battery because it has a higher capacity than the OEM battery and my previous battery was nearing the end of its life (only 15 minutes on a single charge). The battery was received on time and installed without any problems. I then fully charged the battery before testing the performance in my dust collector robot. The initial mileage was not very good. only about 30 minutes. In the last few months I have noticed that the runtimes of my vacuum robot with this Firstpower battery are not nearly as long as with the last new OEM battery I had. I've charged this new battery from full to full multiple times, but the run time stayed at around 40 minutes. My previous OEM battery lasted about 80 minutes per charge. I will never buy this brand of battery again.