Help with Power/Battery Issue - Prestige 14 Evo

I'm hoping to better understand what is going on with my laptop so that I can fix it if possible. I have a Prestige 14 Evo from 2018-ish timeframe. It has always had some type of power issue, but recently it has gotten worse. Here are the symptoms:

-If I leave it off a charger in sleep for a while it typically needs to be plugged in and then will restart with 0% battery

-If it has lost all charge while asleep, it typically will restart multiple times and die right when windows is loading. After it restarts a few times (3-5) it will typically load up and work normally, as long as it stays plugged in

-Sometimes it will lose all power when plugged in and charged, and this depends on which charger I am using

-If the battery charges to 100%, I can unplug, and it will normally last about 30 min or so until the battery says about 45%, then die

-sometimes it will die immediately after unplugging

-I put a new battery in and nothing changed

All of these are typical, but the symptoms vary. Sometimes I can leave the computer asleep for a few days and it starts up normally. There seems to be some intermittent connection issue that disconnects the battery from the computer, but it does not seem to be the battery. Is there another component that I can replace to fix this?