Lenovo Yoga C930 13ikb: events 524 after battery replacement

Hi all,

I have replaced the original battery in my C930 with a noname battery from Amazon. It holds charge like a boss, but specifically when on AC power it intermittently encounters event 524 and hibernates. I disabled hibernation on critical battery state and hibernation is now prevented. Instead, when the battery is fully charged, the charge meter suddenly goes to zero and the critical state is obviously still recorded. I have the latest Lenovo BIOS, but that's a fairly old laptop and software updates have stopped a while back.

I tried two of these batteries and both cause this behavior. Other observations: when discharging to 5%, the laptop will go down to 6% and then completely run out of juice and just power off (not cleanly shutdown or hibernate), which suggests that the reported charge level is incorrect. When charging, it will go up to maybe 96% and then spend over an hour getting to 100%. This happens on every discharge-recharge cycle, which I did maybe 3-4 times. Batteryreport says the capacity is something like 63700 while the designed capacity is 60600.

I think I am still within my return window, which leads to my main questions:

1. Any idea what is actually happening and are there ways to fix this on the software side?
2. If this is a hardware issue, can someone please recommend a good battery for this laptop?

Windows 10 with all updates installed, batteryreport shows Simplio as the manufacturer. Thanks for your help!

Just to add the photo of my battery connector. There's a bunch of posts all over the internet blaming the loose connection, but I don't think I could push it in any further.

Setup mode