About this item【Our Replacement Eufy Battery】14.4V,2800mAh,Lithium-ion-No memory effects,Charging time:Approx 6 h ours,Using time:about 100-180mins,Product size:100*68*50mm,Prodcut weight:200g【Compatible】The 14.4V Replacement Battery for Eufy RoboVac 11C is fully compatible with Eufy RoboVac 11,RoboVac 11S,RoboVac 11S MAX, RoboVac 12, RoboVac 15C, RoboVac 15C MAX, RoboVac 15T, RoboVac 30, Eufy 30C Battery, RoboVac 30 MAX, RoboVac 35C,Ecovacs Deebot N79, Deebot N79S, Deebot 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 an.