Only took 28 days to kill my battery (TN)

Just had my first calibration yesterday. Woke up today to dead battery. Battery and alternator were tested 2 weeks ago and both fine. Of course, I can’t find one person near me to come give a jump. Called in to report it and put it on trickle charger.

If I replace the battery will using or not using a memory savor in OBD harm anything? I seriously don’t trust what these people over the phone tell me. Thanks.