Battery drain

After the 16.2 update my battery is dropping almost 1 percent per minute while gaming in medium graphics and fps. The phone heats up a lot now since the update. In 16.1 update the charge used to last 2 times longer and it didn't heat up like it does now.I have everything unnecessary turned off..I m using iPhone 14 pro max..Can someone suggest some solution or tell me what's happening?