Never had experience with the cheap ones but I have 2x50ah 4s propower lithiums ($600 each) running a 24v 3000w inverter in my shed. They run all my power tools bar the welder & compressor. They are rated to 100amp discharge current. They go hard.
https://www.ebay.com.au/itm/Pro-Powe...xX6YVaIqIWtn5A