I suppose time will tell, but MTO re-built 2 of these batteries that I had been advised were worthless, should be recycled, and buy new ones... all for about 70% of the cost of two new ones, with shipping being about 20% of the total. I re-charged the batteries and they function well, actually running longer than when they were fresh out of the box from Ridgid. So, I have no reason to doubt that they will have a long normal life with the rest of my toys. Oh, I should add that I have more batteries to send to MTO and will, that is the best measure of how pleased I am with its performance.