We are sorry to hear about your experience with your beloved Samsung Galaxy A73 having issues with fast battery drain, and we apologize for the inconvenience it caused you.
If it happens on my device, I will get worried too. But don't fret; we are here to guide you and offer solutions to restore your device to optimum performance.
If that doesn't work, you may submit an error report through Samsung Members app as follows:
Step 1. Long press Samsung Members icon on Apps screen and tap Error reports.
Step 2. Tap OK on agreement popup to send system log data.
Step 3. Select Symptom category "Power/Battery/Charging".
Step 4. Describe the problem in details and SEND.
If the problem persists, immediately bring your device to the nearest Samsung Authorized Service Center. Rest assured that our Samsung Engineers/Technicians are competent to assess your device with suggestions, and offer to provide prompt solutions to restore it up to optimum performance.
For more assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.