Amazon.com: Uniden BP38 Replacement NiMH Battery Pack (Set of 2); for Uniden GMR Radios and Some VHF Radios; Fits VHF Models MHS050-2, Atlatnis 150; Can be Used in Place of The BP40 :
Source Battery for Uniden BP-38 4.8V 700mAh battery BP 38 4.8V 700mAh NI-MH battery on m.alibaba.com