Originally Posted by California Jack
Sure, it is not too much more than 10 years, why?
My point was that it lasts a long time and that the tritium can be replaced. A company like Ball is not going anywhere, anytime soon, so service on the watch would be possible.
FWIW, I thought the life was a bit longer, but oh well...
While Tritium has several different experimentally-determined values of its half-life
, the NIST
recommends 4500±8 days (approximately 12.32 years).<SUP class=reference id=cite_ref-0>
</SUP> It decays into helium-3
by the reaction
<DL><DD><TABLE border=0><TBODY><TR style="HEIGHT: 2em"><TD>
T </TD><TD>→ </TD><TD>
</TD></TR></TBODY></TABLE></DD></DL>and releases 18.6 keV
of energy in the process.