iPhone 12 dies at 60-70 %

Phone dies at 60-70 %

I'll fully charge my phone the night before and go on with my day. But at around 60 or 70 % the phone will die and the Apple logo will pop up as if I restarted the phone. The phone may turn back on by itself but when it turns back on it's at 10% and the battery proceeds to drain very fast, if I wee I take my eyes off for a minute or two it'll already be at 8%. Then it'll die once again and I'll press the power button to try to turn it back on but it'll show the logo saying it's completely dead but once I plug it into a power source the Apple logo will pop up again and when the phone turns back on it's at the 60-70 % it originally died on in the first place.

[Re-Titled by Moderator]