Together with the Aeon Labs Aeotec Z-Wave Smart Switch 6 (Gen5), I also bought the Aeon Labs Aeotec Z-Wave MultiSensor 6 from Automate Asia for S$110.
The MultiSensor 6 can be powered by both USB (Micro USB) or by 2x CR123A batteries. The batteries are not included in the packaging. Based on the specifications, the batteries are able to last you about 2 years.
