Yeah I guess not everyone has issues with the presence sensor battery, I know we were discussing that recently in another thread. Though I’m pretty sure I’ve read before that others besides me think the battery life sucks too.
The salient point for @SquattingHen is that the zigbee presence sensor works very differently than phone presence, and may work well with his particular setup. But if you don’t want to add a keyfob to your key ring (I don’t blame you), then that’s probably the end of that.