Replacement Battery for: Dogtra Edge RT Additional Receiver, Edge Receiver, Edge Collar, Edge Remote Dog Training Collar, Edge RX 100% Compatible with original battery; 180 days warranty Capacity: 500mAh; Nominal Voltage: 7.4V Battery Type: Li-ion Polymer battery; Safe and reliable battery certified by UL, CE, UN38.3, RoHS Over 300 times cycle life; Long working time