Why does my MacBook Pro’s (2015) battery trickle charges for bit, then stops?

A few years ago I replaced the battery of my mid-2015 MacBook Pro which had become inflated. I replaced it with an iFixit battery. At first, everything seemed to go perfectly fine but for quite a while now I noticed two problems: 1. When no plugged in, the battery apparently can die very suddenly. As in, I get no warning to quickly plug the computer in because the battery is low on charge. 2. The battery recharges very slowly and never fully. It stop at no more than about 25%. My original power adapter was frayed somewhat and I replaced it but that didn't help. I also tried resetting PRAM and the SMC but that didn't help. Attached are snapshots of coconutBattery app when I plug in the power adapter and after a few hours. **Update**: I ran a diagnostics from boot. It mentioned that my battery may not be charging properly, suggested that I disconnect then reconnect the power adapter, and rerun the diagnostics. I did all that, and restarted. I still observe the same problem. The battery is not charging and still stuck at the same percentage of charge.