Short answer: Yes. Just as you said (load Battery, trigger from MIDI track in sequencer).
What type of music are you looking to use it for?
I own Battery, but have not used it in eons. I bought Kontakt, which is similar, but is a "all purpose" sampler, vs one made with percussion being the main target.
I love Kontakt. But, I have years of using hardware samplers, so it wasnt a big learning curve. For the "uninitiated," I can see ANY good software sampler having a learning curve. However, Kontakt is actually simple to use with 3rd party sample libraries. Alot of sample library developers have recently begun using the Kontakt engine for creating a player for their libraries. VERY cool, if you like Kontakt. The player they develop using the engine usually does not have near the capabilities of Kontakt itself, but Kontakt owners can then load the library into Kontakt, and HAVE that felxability.
CPU draw is very low, so multiple instances of Kontakt are run easily and painlessly. Direct from Disk sample streaming works well for me, but others (mostly Mac users) hav ehad problems. Using RAM is fine tho.
What platform you using?
Music you will use it for primarily?
Experience with hardware samplers? Synthesizers?
Experience with software instruments?
That would help a little more with answering, and with alternate suggestions.