My iPhone 12 battery backup very low performance
Battery performance very low on stand mode of 3 h battery 30 % down
iPhone 12, 16
Question marked as
Hello Kuldeepk699,
I understand that your battery is draining quicker than before. This can be caused due to a drop in battery health, and one way to fix that is by getting a battery replacement. If you have an active AppleCare+ plan you can replace your battery free of charge, however, your battery health must be below 80%, you can confirm this by going to Settings > Battery > Battery Health.
Apple offers multiple service options including sending it in to Apple's warehouse, taking it to an Apple Store, or scheduling onsite service.
You can go to this link to estimate the cost of your repair if you do not have an active AppleCare+ plan iPhone Repair & Service - Apple Support
I hope this helps with your issue!