I really question whether that "200mA (MAX)" figure is accurate. Maybe it's a typo or something, I dunno, it just doesn't seem right.
I'm thinking about getting one of their other batteries - the PB10800 (
http://www.jr.com/naztech/pe/NAZ_PB10800/). It only does 5V, but there are 5 usb jacks and it's rated at 2.5A. (They say you can charge 2 iPads simultaneously with this thing). I don't know much about battery technology, but it's strange that their higher end, much more expensive battery is rated that much lower on the USB port.
Anyway, I'm thinking the 10800 could be a real nice solution for powering the USBPre2 and a Tascam DR-100mk2. (the USBPre2 spec is "400mA max" and the Tascam is "2.0A". I was in Radio Shack the other day and saw they have a USB connector for their Adapt-a-plug stuff. Does anyone know what the polarity is on a standard USB connector? I'm assuming if I put together an adaptaplug cable for the Tascam that it would be standard polarity on both ends (and not the reverse polarity/ tip negative that Roland uses)?
If I'm drawing 2.4A and this thing has 10800mAh, how much runtime could I expect from this setup? 4 hours or so? That doesn't seem like a lot... is my math way off here?