Sensative Strip battery level indicator

I have a bunch of Sensative Strips. Some of them show battery level, most don’t. Comparing them it seemed like the ones showing battery level also have a “low battery alert” that I created ages ago. So I thought it would just be a matter of adding the same alert to the rest of them… But it seems to have no effect what so ever…

So, how do I get my sensative strips to show their battery level?

Both my strips show battery level but I paired them to Vera many moons ago on much older firmware.

On the most recent firmware I was unable to even pair a new strip there was a thread about it some where.