We have the Popp Rauchmelder 004001 www.popp.eu/de/produkte/sensoren/rauchmelder-sirene/ that sihui mentions for some weeks now.
They work connected even without Z-Wave integration.
They have a manual test button.
And: You can use them as siren - that was something that none of the other smoke detectors have.
Plus: You can add an external supply and use the detectors as Z-Wave mesh network repeaters (only when externally supplied while included in the network).
We don’t use the external supply (yet), but all other features work like a charm in openHAB 2.
Too early for battery life statments, but so far at 100%…
