Specifications Voltage: 14.4 V Battery Type: Lithium Ion Battery Size: Approx. 70.52 * 37.86 * 36.96 mm 1. Compatible with Eufy Deebot N79, Deebot N79S, Deebot DN622, Deebot DN621. Aleivy Eufy battery replacement is suitable for Eufy RoboVac 11, RoboVac 11S, RoboVac 11S MAX, RoboVac 15T, RoboVac 30, RoboVac 30C Max, RoboVac 15C, RoboVac 15C MAX, Robo Vac 12, RoboVac 35C and Amarey A800. 2. Keep your machine running longer and more durable. 2600mAh Li-ion rechargeable replacement battery allows your machine to run longer and last longer, running up to 3.5 hours per charge. Keep your machine clean and dust-free, away from dirt, dust, debris, hair, etc. 3.14.4V 2600mAh Li-ion replacement battery, providing longer running time without negatively affecting the machine. Reliable safety protection function, built-in short circuit, output overvoltage, overheating and output overcurrent protection. 4. Clean more efficiently Keenstone batteries are designed with advanced technology and built-in multiple protections to prevent overcharging, over-discharging, overcurrent, short circuit and internal overheating. For RoboVac and Deebot For Ecovacs Deebot Series: Compatible with Deebot N79, Deebot N79S, Deebot DN622, Deebot DN621, Deebot 601/605, Tesvor X500, Deebot DO3G.10 For Eufy RoboVac 11 Series: Compatible with RoboVac 11, RoboVac 11S, RoboVac 11S MAX For Eufy RoboVac 15 Series: Compatible with RoboVac 15T, RoboVac 15C, RoboVac 15C MAX Compatible with Eufy RoboVac 30 Series: Compatible with RoboVac 30, RoboVac 30C, RoboVac 30 MAX For Other Series: Compatible with Amarey A800 RoboVac 12, RoboVac 35CN