【Our Replacement Eufy Battery】14.4V,2800mAh,Lithium-ion-No memory effects,Charging time:Approx 5-6 h ours,Using time:about 100-180mins【Compatible】The 14.4V Replacement Battery for Eufy RoboVac 11,11S,11S MAX,12,15C,15C MAX,15T,30,30 MAX,35C, for Ecovacs Deebot N79 N79S DN622. Our battery is based on the original size and the function is same with the original battery.【Quailty】Built in Multiple Protections to make sure stability and safety.With Short-circuit protection,over-voltage protection,over-charge protection,over-heat protect.100% fit and no damage to your machince.【Easy to Install】Install the battery in 2 minutes by you own, just need to remove the two screws on the bottom, remove the battery connector and connect the new one, then rev.