A good thing, since their batteries don't last that long. I've had to replace 2 batteries (on Galaxy Ace and Galaxy Mini 2) which had only 2 years of (admittedly heavy) use, while my Nokias sustained a lot more abuse.
What is it about low price phones and replaceable batteries? Is it because the extra bulk/heft is acceptable on those phones and the batteries don't need to be molded?
Edit: well, I'm actually quite surprised.