Cordless Phone Battery Pack BT446, BT1005, BT504 also Fits WHAM For Uniden T-400/500/600 series. Nickel Metal Hydride Rechargeable Cordless Phone Battery. 3.6V 800mAh. Compatible With The Following Cordless Phone Models: DCT646, DCT6465, DCT648, DCT6485, DCX640, DCT746, DCT746M, DCT748, DCT7488, DCX700, TRU446, TRU4465, TRU448, TRU4485, TXC400, TRU5860, TRU5860-2, TRU5865, TRU5865-2, TRU5885, TRU5885-2, TXC580, TRU8860, TRU8865, TRU8880, TRU8885, TRU8888, TRU8866, TCX800, TCX805, TCX860, TRU9460, TRU9465, TRU9480, TRU9485, TRU9488, TRU9466, TRU9496, TCX905, TRU9565, TRU9585, TCX950, TWX955, TWX977 & WXI477. The BT446 battery is a replacement for the BT909. Manufactured by BYD for Uniden