Yeah.. I aproove, I bought many of those for me and friends.
They work pretty well and accurate.. but they dont tolerate reverse polarity
So i modified them in two way:
- 4 wire kelvin measurement probe with seperate spring loaded pins for the current sens and the bleed
-I installed a relay that allow to contduct the tested cell and the tester only when the polarity is ok.. simple, cheap and save you from having blown tester!
I paid like 90$ for 3
I will post my review about it ( the SM8124)in the next hour.