I have purchased four of the Dial a Volts and have had trouble with two of the switches. One of them sticks(on). The other one stopped working altogether. The one that stopped working had a switch that became bent downward(I don't remember hitting it on anything). When I tried to fix it the situation got worse. I wouldn't try to return it after my tampering and threw it in the trash can in an OCD rage. I do feel that the prices for these batteries are substantially too high even at the special prices.