ebay is a child of the Internet. Everything is possible.
There are lot of technological gizmos coming on the market so sometimes it is very hard to figure out what is involved till you actually use it.
DSI heater has a computerized circuit board that relights the flame directly and there is no pilot light. This require constant electricity to work.
My understanding is, that the heater on ebay is standard pilot-operated heater with electronic re-lighter added. Meaning the heater itself doesn't need electricity to work, but for re-lighter to work you need to connect it to battery.
If you don't have 12V
avaiabe, the matches still supose to work.