I just bought a second one after many years. The first I gave to a relative. The newer version is fully functional. The conversion from 220v single phase to 110v single phase was done correctly, so the battery charge section works and it welds on the first hit and doesn't leak current and trip ground fault protected circuits.
I can't communicate in Chinese, but it's nice to know that someone told them about the previous issues and they fixed them.
I paid $140 including shipping this time. Well worth having for repairing and making battery packs and fixing cell phones.