Battery drain on brand new iPhone 15 pro max iOS 17.1

My spouse and I purchased the iPhone 15 pro max--his iPhone has no problems with battery drain with Bitdefender. On my iPhone, however, most of the battery is drained by Bitdefender. I've scanned and found no problems.

The only difference between my husband's and my iPhone is that he uses English as the system's language and I use Traditional Chinese. We both use iOS 17.

Pls advise.

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