John Smith wrote:

...
However, doing the math, 50mw is too much. And, an equivalent of 1kw
emanating from the antenna comes at MUCH TOO CLOSE a distance ...

Sorry I had to take two posts to make that clear.

Regards,
JS

Well, the 3.7v, 900mah li-ion battery lasts ~2hrs of continuous "talk
time", I have verified this ...

It seems 300mw (actual output!) is NOT unimaginable ... :-(

Regards,
JS