Review on Upgrade Your Robot Vacuum With SPARKOLE 14.4V 2600MAh Replacement Battery For Ecovacs Deebot N79S, Eufy Robovac 11 And More! by Lequon Kirkpatrick

Battery worked fine at first with long run time. After 6 months, though, it died and no longer works at all. Ebay doesn't provide an easy way to contact the seller (link on Ebay says to go to the manufacturers Website, which doesn't seem to be easily found on a search engine). I'm starting to get tired of Ebay selling/promoting no-name products that fail rather quickly.Update: Sparkole reached out to me after this review and sent me a new battery. I've upgraded the review by two stars due to their effort. Still wish it would be easier to reach them in the first place.