Finally, the exhausted AA cell stopped working after 120 days. It would have run longer but I changed the on time to 10ms to accelerate it's demise back on day 51. The trials with exhausted cells has led to the following conclusions:
- The larger the battery physical size the longer it can run below 0.8volts.
- The "on" time is critical with regard to energy consumption but is also important in relation to the electrolyte migrating/refreshing between flashes.
More support for the estimated 10 years life from a fresh AA cell.
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