Hami512

Hi, I was wondering if someone could provide me with the specs for Uniden Guardian G2720 battery, the shop who was ordering a new one lost the battery and doesn't know the specs, from memory it was a 3.7v 1250mAh Li-polymer battery, I have tried Uniden with no luck. Size = 65mm x 50mm x 5 mm I have tried the net with no luck either can't find specs on battery Can someone tell what type of connector is in the photo? Thank you