Doorbell/chimes suggestions

Well, they do warn about that on the instruction sheets. We got round it by sticking the bell push on the glass.

My Friedland takes 3 x AA anmd lasts for ages. Perhaps we don't get the doorbell rung very often - or perhaps I use decent batteries

Ours is vertically in between the knocker and the letter box, in the middle of the door. It gets used about 95% of the time, and that's probably down to the fact that it's actually on the door.

Now that's a cold house! A friend of mine once returned to a house so cold that the toothpaste wouldn't come out the tube - or so they tell me.

Industrial batteries might be worth considering for their wider operating temperature and they're not always expensive.

That's why I drilled and threaded bellwire within the chambers of the uPVC frame before fitting it, so I didn't have to have a wireless one, and didn't have any wires on show ...

Be interesting to see how a Ring doorbell would cope.

Based on recent experience, don't buy one. The Android app is poor and the picture takes a while to start, so you can miss the bit you're interested in. It's battery powered so if you have a lot of callers, the battery life can be poor.