In the past, I've used the PetPorte (now owned by Petsafe) microchip cat flap and been very happy with it because it had both a power cable and batteries. I've moved house, brought the cat flap with me and finally getting round to having it fitted on a new door.
However, since moving, we've acquired 2 new male cats who are bigger and chunkier and struggle through the internal cat flap we have so I'm wondering whether going for a Sureflap Pet Door would be better. As far as I can see, it is only powered by batteries and I have visions of the cats bashing against the door when the batteries run down and I haven't noticed.
Does anybody have experience of using both these types of microchip cat flap and have a particular recommendation? (Or use the Sureflap and wholeheartedly recommend it). We'll be having the door cut to fit the new flap so don't want to make a mistake.