Bill
It will be 5 or so daytime until spring here and OM-4s should be ok for anything but one minute time shots, the battery has to hold an electromaget the whole exposure.
If you replace the Ag2O's every 6m the camera should be ok - only the very late OM-4s (or reworked ones) have the same dark current as the OM-4Ti's. It is best to pull batteries at the end of day with an OM-4, the dark current is their only problem.
You can measure the dark current with a multimeter, it can be high for a SR44, I forgotten what mine had it was too horrible.
Noel