I use an ft-857 and right now use a car battery as a power supply. There are tons of factory and after market accessories. There are for all radios though.
I got mine because it is small and I can take it out of the house and with my buddipole or wire antenna and a 10 amphr battery hike and do summits on the air.
I can also use it in my car as a mobile unit.
just my 2 cents. I didn't post this because i'll get torn up by someone I'm sure.
If you have any questions i'll be happy to help.
Gary