u/Top_Avocado_9083

idk where to put this, but basically my phone randomly started charging extremely slowly. it used to get to 80% before midnight while I was on it no problem. Now ill get off of it and go to sleep at around 11-midnight, and when I wake up it’s not even past 75%. I’ve had it on low power mode because the battery will actually go down while I’m charging it and on it if it’s not. It’s not an issue with the cable, I don’t think, I‘ve got it on my sister’s charger while writing this and it’s gone up 1% in 15 minutes. battery health is at 83% according to settings. Any ideas on the issue and if so, can I fix it myself ?