The LEDC battery life test concluded with an error (reset) after 735 hours (30+ days), 217 hours greater than predicted. My prediction assumed a higher current load than actual. In addition battery chemistry and the ability for it to recover seems to have also been a factor.
The LEDC actually continued to operate and keep time, but the processor reset when the hourly chime occurred, the chime can draw up to 90mA and the processor browned-out.
With the chime disabled the clock continued to operate, but I concluded the test. Now to the next test, which is continuous operation without sleeping, and chime on the hour. This will not last as long, probably 72 hours or so.