· 【Upgraded 4.0Ah Capacity】: The real-capacity 4000mAh lithium-ion deebot replacement battery provides an ultra-long running time of 120 to 180 minutes when fully charged. The specific time varies depending on the machine model and age, most can last 2 hours, and the life span can be up to 1000+ cycles(1cycle: full charge→full discharge).· 【Compatibility】: Compatible with Eufy RoboVac 30C Eufy RoboVac 11 11S 11S MAX RoboVac 30 30C RoboVac 12 RoboVac 15T 15C, 15C MAX, RoboVac 35C Conga Excellence 990 DEEBOT N79S N79. 🚩To aviod wasting time, you'd better remove your original battery from your robot vacuum and make sure yours is 3-prong plug as ours· 【Safety and Stability】Built-in intelligent CC CV charging circuit provide comprehensive protection: overcharges, over-discharge, over-current and overvoltage protection to ensure safety and extend battery life. Acquisition of CE FCC ROHS certificates.· 【1000+ Recharge Cycles】Batryuic 4.0Ah(No Fake High Label Capacity)Ecovcas battery replacement can be recharged up to 600+ cycles of use(1cycle: full charge→full discharge). No memory effect, low self-discharge rate and long-lasting battery life.· 【Buy Worry-free】We provide 30 days full refund and return, 365 days limited warranty, 24 hours warmly service. 💌Contact us: Any question click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller"