I am sick of the 12v as well, carry it around for the ad2k, too heavy but sounds sooo good.....
What did you not like about the 9v. I just purchased one for my psp-2 but did not get it yet
Just to be clear I didn't like the rechargable 9 volts, not the walmarts, as they burned me a few times and have had my best luck with Ultralife 9v lithiums, which run about 50 bucks for 10. I would get a good 15 hours of power using 2 at a clip ...