I've got the 250c, and that has a side magnetic panel (left-hand side, I think). I know Steam Crave's owners have publicly talked crap about "threaded, screw-type" battery caps in the past, so I would bet on a similar set-up. If it did the ole "rear wrap-around", "U" shaped magnetic door, I would be pleased!

-Just for reference, The Hadron PRO had firm, solid magnets...I heard a few early, first batch complaints of wobbly doors, but I haven't seen any evidence. Mine is fine (I hope- I forgot it over X-mas out of state, and it's being mailed to me, lol)