PANTECH BTR291B 3.8V 4100mAh LI-ION BATTERY Battery Compatible for Pantech JETPACK 4G LTE Wifi Hotspot Battery (Li-Ion 3.8V 4100 mAh ) - Replacement For Pantech BTR291B Battery Package Dimensions 3.19 x 2.17 x 0.47 inches Item Weight 3.52 ounces ASIN B013RK8PIS Item model number 335477-EM-BLI-1371-4.1