zlacker

> I want a thick clunky device without a screen that can run for 4-7 days without charging.

That's a landline phone, you can buy it for cheap.

>>carlos+(OP)
> It needs only 20-30 meter range.

And, this is trivially satisfied with a $10 extension cord.

>>nomel+z1
That would be a different idea i also like. Something like calls over wifi but use ethernet in stead. No more radiation

>>theend+Kd
so... VoIP?

>>theend+Kd
I was thinking a regular analog POTS phone. ;)