I've done this ... not as neat as Hi-Phib's but works just fine. I took a normal USB cable and cut the power conductors about 100mm from USB B plug. On reconnecrtion remember you need a common ground from computer to power supply uDSD. Test and retest connections ... blown USB ports can be costly. The improvements when running from a USB charger or (better still) power bank are noticebale and significant. Very similar to the improvements of a decrapifier like AG Jitterbug ... blacker background, cleaner transients, improved detail and staging, sweeter tops, firmer bass.