Sunfish,
I have an Icom A6, bought in Australia from Skylines years ago. Might carry it as an emergency backup or for use marshalling or suchlike.
I was looking at the Icom A6 or A24
Apparently the charger does not switch off itself, so it will overcharge and damage the battery.
Therefore it wouldn't suit sitting at home in a charger been left on during the day.
Some other models (cant remember which) say they can be powered by 12V but will not charge. I believe their 12V connectors puts out 11.5V or something silly like that.
You didn't say whether you thought the Icom A6 was a good Hand held.