There is another blurb in the User manual that states:
"Cycle the main power off/on on the MiniCore after you install a backup battery for the first time, and whenever you replace the battery. This step will minimize the current drawn by the real-time clock oscillator circuit from the backup battery should the MiniCore experience a loss of main power."
This turned out to be very important for our customers using a different module, as we ship the product with an insulator strip between the battery and connection terminal. If that strip was pulled out without cycling power, the battery draw was doubled.
Something to remember...