Hey, Guys...
I'd like to throw in my R-09 info contribution...
I just did a battery test with Eveready NiMH rechargeables (slow charged), and they lasted 7 hours, 20 minutes, and 23 seconds!!!
I used a Sandisk 1GB SD (normal speed) and recorded one long file as an mp3@192kbps, which created a file size of 605mb.
I did not stop the recording manually. I let the batteries run down to see if the file would be saved intact, and indeed it was.
Also, I did adjust the input gain settings while recording, and there is NO zipper noise while adjusting the digital gain!
The quality of the recording is very good. Better audio quality than the R-1, and better stereo separation.
By the way, I have used both Sandisk and Lexar cards with it and I have had no problems with either brands.
The timestamping is a nice addition, and you can see the current time in the bottom right corner of the home display.
While recording, one can see the remaining/available time left on the media...and while in playback, one can see the current location time in the file.
I love the OLED hi-res screen! And this baby is FAST!
It is VERY quick & easy to stop the recording, and quickly press the Record button twice to make a new audio file...in less than a second!
I'll keep testing, and post more info as I learn more myself...