I suppose I'll just wait and see what happens with this keyboard in a couple of years. If it turns out that I lose the backlighting, I will be very upset. I see 7 screws, so it shouldn't be impossible to open up, and the leads can be cut to slice in a new battery.
Otherwise it has to be sent back to Corsair and pay to have them replace it, which would probably be cost prohibitive. Seriously, meh.