[Luny Tune]

I don't know much about cameras in that regard generally, but all electronic devices with any type of memory (except some ROM types) I've come across while working in audio over the past 25 years have had CMOS batteries in them. I'm pretty sure all cameras today have them soldered in as well. They last a loooong time, so I'm sure you'll have bought a new camera a couple of times before the current one is in any danger of running low on that. If it does, just get it changed where you'd get it serviced in other situations.