1.Type: Li-ion battery, voltage: 14.8 V, high capacity:4500mAh 2.Compatible replacement battery designed for Compatible with XIAOMI MIJIA Mi Robot Vacuum-Mop Essential G1 MJSTG1, SKV4136GL R30 R35 3.With over 500 charging cycles and the CE FCC and RoHS certified. Protection against short circuit, overcharge, over-discharge, over-current, and over-heating. 4.Hassle-free installation and safe operation make it an easy and affordable option for maintaining the peak performance of your Xiaomi G1 sweeping robot.