I'm pretty happy with my Blueant Supertooth II

Although it's not a headset as such. Lasts about a month between charges in "standby" depending on how much you use it. It worked great switching to and from the handset with my Nokia 6230. Not so good with my Nokia E61. Works quite well with me new imate Ultimate 8502 (WM6)
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)