Compared to these results, my little Canonet is downright current-ravenous! I can expect maybe 2-5 outings of life from one 675 zinc air cell. I'm guessing/hoping that there's some sort of fouling/shorting/issue with the circuitry that a good CLA will fix, and that I'll get plenty of life from a silver-oxide, once it's been converted.
Do you use a lens cap? As I recall, the meter is always on.
"Far more critical than what we know or do not know is what we do not want to know." - Eric Hoffer