Thanks for all the replies to what was simply an idle, off-the-cuff question. I'm not in the market for such a jack, am just curious why no 18v OEM has one in their line-up. DogDog's liability guess seems plausable, though every jack I've ever bought new came supplied with skad of legal disclaimers.
I use a scissors jack 18v 1/2" drill for light stuff and have had my eye open for a screw type bottle jack (more stable, but less lift height) for over a year - though I haven't been actively looking for one.
The idea popped into my head the morning after stringing 150+ feet of line to a 12 ton air operated hydraulic bottle jack under an F800 - former tree service truck - large 3 section boom crane, outriggers and a dump bed. Too big a job for any scissors jack or screw type bottle jack I've ever seen.
What I pictured in my head was an electrically operated hydraulic bottle jack, but left my post non-specific so that things like Luciferi's
$1200 AGM (ouch) suggestion might turn up.
I wasn't thinking about a jack you put in the trunk of the car and forget. Just a highly portable, powered bottle jack - kept in the shop - that did not require umbilical power. If my battery eco-system had such an animal it would be on my wish list. If it were 6 ton, it would be on my buy list.