Thanks for replying. That's impressive 7 years on the same battery. Good to know that tuna wears similarly as well. Fancy the new 300m woth black bezel insert. Will keep it on my list. I like the idea of a 1000m but I think it'd be too chunky for me.I've got both and they wear about the same imo, but obviously the lugs are longer on the Arnie.
My Tuna is over 7 years old and I haven't had to change the battery yet. Been a consistent +0.1s/d since I've had it.