Macgyver charging my phone

Today I found myself in a lab expecting a phone call - only one problem. My phone was currently showing 3% charge - not good!
After asking around if anyone had an Ericsson charger, I was left to try and get some charge into my phone another way. After googling for pinouts I found just what I needed.
Using a breadboard, a lab powersupply and some wire the phone was up to 60% charge in half an hour or so.
Note: If you don't know what you are doing - don't try it (and turn off your vibrate, unless you want sparks to fly when the phone rings)