Battery type: Li-MnO2 Capacity: 2000 mAh Voltage: 3 V Energy: 6 Wh Number of cells: 1 Dimensions (L x W x H): 4.5 x 1.8 x 1.7 cm Weight: 25 g Compatible with the following device models: GE Fanuc Digital Servo Adapter GE Fanuc CNC Series 16i/18i/21i-A GE Fanuc CNC 18i To ensure compatibility, please check to see whether the non-rechargeable battery you are currently using is listed below.