The instruction sheet says replacement should only be by a qualified watchmaker. Has anyone had a go themselves or have they had a good experience with an Auckland based watchmaker?
My concern is that if it's not done properly it will always leak.
8. BATTERY REPLACEMENT The watch and timer battery should be replaced
by a qualified watchmaker.
Watch: 1x CR2032 3.0 volt Lithium battery
Timer: 2x CR2032 3.0 volt Lithium battery