I'm not familiar with the A5 or A6.. I have an A-22, the NAV function is
not of much use with the rubber ducky antenna on my A-22... I've tried to
use it once.. so.. maybe save the $ and not get the Nav model...

Agreed. I had the A21, with the NAV feature, and it was utterly useless.

I now own the A5 (I think? It's the ICOM without the NAV feature) and it's
great. Very small (especially by comparison to my old A21, which was twice
as big and over twice as heavy), lightweight, rugged, water-resistant, and
has great sound.

It uses either rechargeable batteries, or a separate alkaline battery pack
(which is what I use), or external power. It's a great little unit.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"