A power bank (or et least the ones I used) has a very high self discharge. Most of the times these consist of a a few lithium cells with a cheap (boost) regulator. Better use standard (rechargable) cells.

Is it possible to use the same sensors with both ethernet and MQTT? I am currently using the ethernet gateway with vera but I would like to try MQTT/OpenHab. I would like to see the same sensors in both environments. Is the possible use the mutt gateway with vera? Thanks in advance.