Ok, slightly of topic, but since we are sharing the same problem, I guess I can count on some sympathy here

After reading the suggestion about mobile charger, and reading about the extra time it provides, I've started to look for a tekkeon device, and google did not help me much for finding it in London.
When I try to explain it to people in cell phone or computer shops, I get the "wtf?" look from everyone. In case someone knows where to visit london for asking about this gadget, I'd love to hear it
ps: I was in a conference today, and they gave us all begs with brochures and usual useless stuff. I checked it out and it turned out to be a mobile charger

A quite crappy one though, not usable due to lack of cable etc..
Best Regards
Seref