Yes, I'm sure you are right. A year ago I saw someone using a folded up electric blanket and I did look for reptile flat pad heaters at that time to help him out. They were 240V, but I didn't easily identify a local supplier (didn't walk into my local pet store - a bit lazy
). When it came to buying heater straps, it was easy to add an extra one to the order and being 12V, I have mobility and controlled heating.