Thsi is a huge difference from the charger I bought from Shorai originally. I have been struggling for a while to get the batteries to charge and thought they were throwaway. ALL of my LiFePO4 batteries have benefitted from this charger. One I had to throw away because a cell was dead, but the charger actually told me this. Saved heaps of grief. Appears , at least in the short term, to be a very good product.