14.4V 2600mAh Replacement Battery Compatible with Ecovacs Deebot N79 N79S DN622 & Eufy RoboVac 11, 11S, 11S Plus, 11S MAX, 12, 15C MAX, 30, 30C, 35C, G10 Hybrid, G20 G30 G35 G40 Hybrid

Works great

Worked perfect for my Eufy

This battery worked great for about 6 months. I’m fact, my vacuum ran longer than it did brand new. The battery replacement has a year warranty provided with purchase but no contact information on listing or in instructions of which I kept. I’m just going to chalk it up to my loss but did gain an extra 6 months out of my 2 year old robot. My question is….. why does nothing last anymore??????

i used it for about 2 months and now the battery doesnt last longer than 30 minutes. disappointed. the website says there is manufacturer warranty but there is no contact info to reach out to them.

The stick vac was easy to assemble and works very well. I like that the attachments will hang on the wall plate. One of the release buttons at the top seems a little sticky but I hope it will loosen with time. Good suction and easy to empty

The battery life on my Deebot 661 got very bad. After only around 20 minutes, my robot started looking for its charger base. Bought this battery to replace it. Now the robot is back to running around for a couple of hours before it goes back to the charger. I'm happy about that.What I'm not happy about is that it rarely makes it back to the charger. It seems this non-OEM battery discharges too fast for the Deebot's "battery low" threshold. Once the robot recognizes the battery is low and it needs to return to the charger, the power is already too low to make it back on its own. I have to carry the robot to the base. Small price to pay for having the vacuuming time back to normal; but still less than ideal. Guess I'll try the OEM battery, next time.

I thought the battery died after 15 minutes and I was planning on returning it. Not so. My 3 and a half year old Eufy 11S Max apparently has a problem with the roller brush (solid red light and 4 beeps). I followed the suggestion of others and tried running the vac without the roller brush. It went the usual full amount of time. Didn't pick up much dust however. So now I'm trying to figure out how to fix the roller brush issue. But I love the vac so much I may just buy a new one. Especially like the On/Off switch on the underside. Don't want a vac with a lithium battery to suddenly decide on its own to start wandering around the house.

Was about to buy a new robot vac, but I’m glad I decided to replace the battery first. The battery charges effectively and the runtime is much longer. Battery was easy to install, worth the money!