Both the Off Road and Weathermatic are pretty good with battery life, no power zoom to drain power. I had a fresh battery in the Weathermatic it lasted well past the 8 or 9 rolls I shot with it in Iceland, just pulled the Weathermatic out and found I had left a battery in it, not used for a couple of years, it powered right up. Same with the Off Road, fresh battery, shot 3 or 4 rolls of film with in Alaska over 10 days. Dont have the Konica manual, but the manual for the Weathermatic lists 54 rolls with CR5, so I guess about the same for the Konica. I
Last week was the 30th anniversary of our hottest day on record, 122 F, at time we were living in house with garden, my termomotor in the shade read 128.