Hi gurneet806,
Welcome to the Apple Community,
where some of us do the best we can to help each other troubleshoot.
Wondering which iPhone you have, and which iOS is installed on it.
You could check which of the apps you use are using up the battery power.
Monitor the iPhone battery level
(eg: scroll to: "View your battery usage information")
https://support.apple.com/en-au/guide/iphone/iph4747a74a9/ios
Apple support have other articles online that may be helpful.
About charging the battery
Eg: You can scroll to "Turn on Low Power Mode"
https://support.apple.com/en-au/guide/iphone/iph63eecc618/ios
More About Optimized Battery Charging on your iPhone
https://support.apple.com/en-us/HT210512
Tips about maximizing battery life and lifespan:
https://www.apple.com/batteries/maximizing-performance/
Or
Would upgrading the iOS help ?
(Allow a day or two after upgrade, before you would notice if it helped.)
Hope there is something here that solves the situation.
All the best :-)