When my wife was having battery problems with her 810 we found it was an issue with the unit repeatedly trying to find Garmin Connect on her phone. Once we quit connecting to GC it improved a great deal, and turn off BT on the unit too since you don’t connect sensors anyway.
Maybe not connecting it to your phone will help you as well?
Are you on the latest firmware? I’ve heard of battery issues on the 130 for a while Garmin might have addressed the issue in a new firmware update.