【Our Replacement Battery 14.4V】14.4V 2800mAh,Lithium-ion-No memory effects.The rechargeable battery for eufy 11 has 2800mAh, the standby time is longer than the common 2600mah in the market. The function is the same as the original battery. Charging time: 5-6 hours, after fully charged, it can work for 100-180 minutes, realizing uninterrupted cleaning of the whole house. (Note: Please charge the new battery before using it for the first time).【Compatible】Compatible with for Eufy RoboVac 11s, RoboVac 11S, RoboVac 11S MAX, RoboVac 12, RoboVac 15C, RoboVac 15C MAX, RoboVac 15T, RoboVac 30, Eufy 30C Battery, RoboVac 30 MAX, RoboVac 35C,for Ecovacs Deebot N79, Deebot N79S, Deebot DN622.Our battery is based on the original size and the function is same wit.