BT446,Uniden BT446 Genuine Original OEM Uniden Shipped with Uniden Phones, Part Number BBTY0504101, Nickel Metal Hydride Rechargeable Cordless Phone Battery Pack; Equivalent to Uniden BT909 BT1005 BT504; Fits WHAM; DC 3.6V 800mAh; Also known as BBTY050400