yeah, around $100.... it is designed to plug into a cigarette lighter yeah, but you can cut the plug off & hardware it in no problem.... startup & shutdown can still be worked out... either with the p1900 or a stand alone controller, or webmasters relay thing, or a push button on the dash... I used to use this with an opus that did all my start/shut down...

again, this is only a concern if you must have the battery being charged for you while it's docked in the car.... you can run your laptop right off the p1900 & not bother... I don't know for sure, but I think it won't discharge the battery either, & may be very usable like this.... depends a lot on how you intend on using this, as an in-out daily, or in the car for weeks at a time I guess... either way, even if you threw the battery out, it would still work 100% as a carputer with just the p1900, just so your clear on that too...

I don't know what the issues might be with the bios if any though