For all those who have swollen battery within few months, I think that the laptops FW or BIOS have configured battery to be the primary power source and then AC adapter is treated as a secondary source for extra power. If you try to run any GPU intensive task after removing the battery, you'd get GPU Power Limit throttling as evident from MSI AfterBurner and in Intel XTU, you can see Current/EDP limit throttling while running a CPU intensive task.
This is something which Tongfang should fix and Illegear should co-ordinate with them to get a working FW/BIOS for all users having battery issue.

Sad to see no effort from Illegear for this specific bug from last 3 years or so.

Mine is 1.1 years. Looks like I must be prepared for this too. Where are you gonna buy the battery and change? SC charge arm and leg right?

Is the battery compatible with Onyx 1060? Or does anyone know which one to get from Taobao?