I think you must have a special one @Alison – While perhaps not as properly wibbly wobbly as @Tim’s my Veo also likes to decide to go down to one bar after about a week of use, then have a bit of a think and return to two bars, then try out one bar again for a while. The one bar setting seems by far the favourite as it’s happy to site there for perhaps a month before springing the ‘Low Battery’ surprise when I’ve forgotten to take batteries with me somewhere remote.
What larks!