I agree about CSSU stable quality, but nevertheless I am not comfortable with the idea of making an application dependent upon it, at least not when the functionality concerned is trivial, but I am sure there will be cases in future where there will be no option but to depend on more recent Qt libraries (and therefore CSSU). I much prefer the idea of a runtime check, though in this case I don't think it's necessary. I moved the batteryindicator stuff to QSystemDeviceInfo, so it should hopefully be OK for the next update. If not, I'll use the runtime check that I have now implemented just in case.