Yeah...This may sound majorly obvious even after my explanation, but I need some help.
I just spent 70 dollars on a battery + charger bundle (12v, 5000 mAh) http://www.batteryspace.com/nimhbattery ... baetc.aspx" onclick="window.open(this.href);return false;
I took a good look at the battery and asked myself "how the heck am I supposed to wire this to the Dreamcast?"
That is my question. http://img30.imageshack.us/img30/2333/hni0078.jpg" onclick="window.open(this.href);return false;
The picoPSU is the usual way to do it but not strictly necessary.
The Dreamcast require 3.3V, 5V, and 12V. In reality the 12V line will run on power as low as 7.4V, so you can connect your 12V battery directly to it (I think). You can get 3.3V and 5V using TI cards or other regulators.
Then again, the picoPSU may be the best option. It's more expensive but easier and virtually guaranteed to work.