Fits original part number: MK11-2902, MK11-2903, MK11-3023 Product Details: Li-ion, Voltage: 3.7V, Capacity: 570mAh / 2.11Wh, Dimension: 46.25 x 34.24 x 4.53mm, Weight: 42g. Multiple safety protection, high capacity, light weight, high quality battery. A perfect replacement for your original battery. No memory effect, over-charge, over-discharge, over-heat, over-current and short-circuit protection. If you have any questions, please feel free to contact us, we will provide you with the best service.