1) I'll try other types of battery but the unit and the box mention only 1.5V cells. I don't have any NiMH AA cells to try with. I have some prismatic cells from my other unit. (JVC XM-P55, good unit)
2) No curiosity eh? :smile: I've always suspected those ugly casings to contain mostly air.
3) Not my point: the PCB has location for parts that line up with the holes. Maybe if we know which parts to add, and how to modify the firmware, we can get the extra functions to work. It's absurd to release the same product with different specs in different countries. I smell lawyers at work here.
4) The Hi-LP mode sounds pretty good for Walkman duty. On the street, in the bus, etc... I don't really notice the extra hiss and distortions. ('vocoder' vocals for instance). But in a quiet room, forget about it. But then that's not the intent of a Walkman. But yeah, 256k sounds very good, even on DDD Karajan classical recordings. Good job by Sony here. But I'd like to know why there's no 128k atrac3plus. I'm off to read the FAQs I guess.
5) I don't think the capacity is going to be a factor, but rather the price. It's fairly slow after all. The sound quality of the headphone amps on all MD portables I've used has always been superior to MP3 units, I think that's because MD equipment has always been made by audio companies, and MP3 players by computer companies.