I have a Samsung galaxy s21 ultra which I’ve had for 2.5 years. When I first got it, battery lasted me 2 days. Now it doesn’t even get through one day.

The Samsung members diagnostics app shows battery health as ‘normal’. Would changing the battery make any difference?

Some users said when they replaced the batteries when battery health was showing as normal, they saw no significant improvement at all despite their batteries being old. My battery is now 2.5 years old