Hmm only a 1050 mAh battery? Well, on the one hand that seems a bit low, but on the other hand I can see why (for a "consumer device") they'd want it to be as slim as possible, and batteries can be a big issue for that. Plus I wouldn't discount the possibility of some rather improved power management (I mean, my sister's N8 has a smaller capacity battery than my N900 from what I remember, but I carry a spare and for hers it isn't an issue, so definitely one can offset battery capacity).

That being said, I wouldn't at all be surprised if the rm-745 turned out to be a Symbian^3 device, considering (as stated) it has the same battery as the C5. Although to temper my skepticism, the N900's battery is the same as the 5230 (for those not familiar, it's a contemporary-to-the-N900 low-end Symbian touchscreen) so maybe I shouldn't be so doubtful.

Always important to stick as close to what we directly know, and to treat our assumptions and hypotheses as what they are, mere conjecture. That is to say, the FCC confidentiality times can't expire fast enough