Review on 🔋 4.5Ah 14.4V Ni-Mh Replacement Battery for iRobot Roomba R3 500/600/700/800/900 Series by Casey Collins

I bought this to replace my 5.5 year old 770 battery which was just starting to show signs of degradation after only 50 minutes of use. I bought this product which promises longer battery life (4500mAh vs 3000) but the first one only lasted 70 minutes. Not many improvements over my original dying battery. Got a replacement from Revain but found it took 60 minutes before dying in the middle of the floor. And yes, I charged both overnight after restarting the device. Don't waste your time with this brand.