Yes, it was discussed in another thread recently that the battery indicator of the HR92 is far too coarse and not particularly useful. I would go by when the controller starts to report faults.
On mine they only stay on 3 bars for a month or two then spend most of their life at 2 bars, and when I started to see intermittent low battery warnings being logged to the fault log (I had not yet seen an on-screen red warning) the HR92 still reported two bars. I suspect it had another couple of months before it died but I replaced the batteries anyway (at about 15 months) and the fault log entries stopped.
As I've had that valve set on the more battery hungry "full stroke" mode for about half that time I consider 15 months to be a reasonable battery life.
On mine they only stay on 3 bars for a month or two then spend most of their life at 2 bars, and when I started to see intermittent low battery warnings being logged to the fault log (I had not yet seen an on-screen red warning) the HR92 still reported two bars. I suspect it had another couple of months before it died but I replaced the batteries anyway (at about 15 months) and the fault log entries stopped.
As I've had that valve set on the more battery hungry "full stroke" mode for about half that time I consider 15 months to be a reasonable battery life.
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