I picked up an everready XP8000, external laptop battery/charger on Woot. More then enough power to drive my three MR16 LEDS, but it has crappy connectors. THe 12V and 18V outputs use those crappy coax power connectors. And only work if everything is completely still. Any vibration will break the contact. Right now I've got the connector taped to one side which will work for a few minutes of riding then I have to stop and find a new sweet spot. I've tried three different connectors adding a bit of solder to a connector and even sodering a bit of wire to the side of the connector to make the fit tighter. No dice.

I'd love to open it up but it's sealed,and it looks like what might be screw heads are covered over and sealed. Everything else about this setup is pretty good, more then enough light and time, and a very low weight. But the unpredictable blackouts are very frustrating.

Anyone else try to use these for a light with better results?