This Panasonic KX-TG8321EB TAM phone comes with up to 12hours talk time and 150hours standby time. It also features 200 name and number memory with 6 polyphonic ringtones. This TAM phone has a 300m range from handset to base allowing it to be more like a mobile phone. The answer machine has up to 40minutes recording time and a built-in speakerphone for handsfree.
I got my from when I last posted this and it is great - highly recommended