I bought the v2 hub starter with an addition of a water sensor, also the Samsung one. Noticed that batteries are wearing now and in my app giving me warnings. So reading through posts on no Energizer and different types of batteries. Mine has the 2450 Panasonic. Thinking just get the same for now, but have a question on this. How accurate is the battery life indicator? Is it only in the app where you get that info or does it also show on the device itself somehow? For instance, my motion sensor shows 1% in app, but there is no light indicator on the device itself.