I've used Dodd preamps for years. I also had a variation of that Dac that Danny uses, but I let it go to Ron Vedder- I couldn't keep it from dropping connection. I also had a Dodd phono preamp-- a very nice piece, but i had to admit I liked a much cheaper Jolida better. So it also went to Ron.
The preamps? I'm sure there's something better, but I haven't heard it.
The other battery powered gear that I use is our own Folsom's tda7297 chip amp. I've got a couple of Dodd amps that are excellent, but Jeremy's amp is right there with them for speakers that don't need power.