I am looking at buying a pair of handheld radios and have narrowed it down to the following two models which are identical except for price (obviously), TX power (3W vs 5W) and a higher capacity battery in the more powerful model:

http://www.gme.net.au/products/radio-communications/uhf-477mhz-handhelds/TX680

http://www.gme.net.au/products/radio-communications/uhf-477mhz-handhelds/TX6100

My question is, how much extra range can I expect (given LOS) for the extra TX power?
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Peter.

"I spent 90% of my money on women, drink and fast cars. The rest I wasted." - George Best