[. . . ] [. . . ] IMPORTANT: Be sure replacement battery is the same size, shape, voltage and polarity as the one you are replacing. Charge for 16 hours before first use. INCORRECT CORRECT MODELS AT&T: 4126 Panasonic: KXT: 3610, 3620, 3705, 3710, 3720, 3730, 3850, 3855, 3860, 3878, 4000, 4300 Sony: BPT18 Southwestern Bell: FF: 650, 675, 1650, 1700, 1725, 1755 Toshiba: FT6003, FT6503 Uniden: AE155, AM468V, XC200, XC265, XC301, XC310, XE442, XE785 [. . . ] [. . . ]