Compatible Model: GBT4400, GBT4430, GM4100, GM4100-BK-433Mhz, GM4130, GM4400, GM4430, RBP-GM40 Compatible Battery Part Number: BT-8, RBP-4000 Specifications: Voltage:3.7V Capacity: 3400mAh / 12.58Wh Size: 68.70 x 18.40 x 18.40mm Weight:91.1g Tips Before Purchase you Please double confirm the compatible model and original battery part number before you purchase it. . If you are not sure, send email to us with your battery details or pictures, we will give you free professional suggestion. Your satisfaction is very important to us,if you have any questions,to send eamil contact us,and we will reply within 24 hours.