I looked into various units, and as I mentioned in the other thread (linked above) the Rikaline 6033 is cheap and technically excellent - I can confirm that the cold start time is around 30 seconds, warm start just a couple of seconds. It comes with an AC charger (100-240V) and car adaptor, plus some metal disks to attach to a dashboard, although the rubber pad on the bottom is probably good enough for most applications.

Gareth