“I have the model 9100026 4 volt max screwdriver 50-piece set. I've had this less than 2 years and have probably only used it four or five times. Plugged it in the charge it up the other day and no matter how long you leave it plugged in, it will not charge and therefore will not work. I would expect something of this sort to last longer than this and certainly after only using it for five times. I would not buy another product from this company!”