Iphone 15 battery dropping fast

So , i have bought my Iphone 15 in the release week . Since the beginning i’ve noticed some overheating but i brushed it off since so many people were having it , but i still feel like it overheats especially when using the camera and making calls. 10 months later , my battery health is at 88% at 308 cycles , which would be 1 charge per day . Im worried its dropping too fast tbh and i wanted to know if this is normal .

Iphone 15 battery dropping fast
 
 
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